CMS 2016 Paper II \u2013 Part A (Q1\u2013Q40)<\/title>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=Playfair+Display:wght@600;700&family=Source+Serif+4:ital,wght@0,300;0,400;0,600;1,400&display=swap\" rel=\"stylesheet\">\n<style>\n\/* \u2500\u2500 Namespace: cms16p2a \u2500\u2500 *\/\n#cms16p2a *,#cms16p2a *::before,#cms16p2a *::after{box-sizing:border-box;margin:0;padding:0}\n\n#cms16p2a{\n --ter:#C0603A;--ter-light:#e8825f;--ter-pale:#fdf1ec;\n --teal:#2A7A6F;--teal-light:#3da394;--teal-pale:#eaf4f3;\n --ink:#1a1a1a;--ink-mid:#444;--ink-soft:#777;\n --line:#e0d8d4;--bg:#fdfaf8;--white:#ffffff;\n --correct:#1e6f46;--correct-bg:#eaf7ef;--correct-border:#43a047;\n --wrong:#b83232;--wrong-bg:#fdf0f0;--wrong-border:#e53935;\n --radius:10px;\n font-family:'Source Serif 4',Georgia,serif;\n font-size:16px;color:var(--ink);background:var(--bg);\n line-height:1.7;padding:0 0 48px;\n}\n\n#cms16p2a .cq-sentinel{height:1px}\n\n#cms16p2a .cq-statusbar{\n 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.cq-retry-btn:hover{background:var(--teal);color:var(--white)}\n\n@media(max-width:480px){\n #cms16p2a .cq-header h1{font-size:1.15rem}\n #cms16p2a .cq-qtext{font-size:0.88rem}\n #cms16p2a .cq-opt-text{font-size:0.84rem}\n}\n<\/style>\n<\/head>\n<body>\n<div id=\"cms16p2a\">\n\n <div class=\"cq-sentinel\" id=\"cms16p2a-sentinel\"><\/div>\n\n <div class=\"cq-statusbar\" id=\"cms16p2a-statusbar\">\n <div class=\"cq-sb-stats\">\n <div class=\"cq-timer-item\" id=\"cms16p2a-timer-item\">\u23f1 <strong id=\"cms16p2a-timer-display\">40:00<\/strong><\/div>\n <div class=\"cq-sb-item\">\u2705 <strong id=\"cms16p2a-sc\">0<\/strong><\/div>\n <div class=\"cq-sb-item\">\u274c <strong id=\"cms16p2a-sw\">0<\/strong><\/div>\n <div class=\"cq-sb-item\">\u23f3 <strong id=\"cms16p2a-sr\">40<\/strong> left<\/div>\n <div class=\"cq-sb-sep\"><\/div>\n <div class=\"cq-sb-item\">Net <strong id=\"cms16p2a-sn\">0<\/strong> \/ <strong id=\"cms16p2a-sm\">160<\/strong><\/div>\n <\/div>\n <div class=\"cq-sb-progress\"><div class=\"cq-sb-fill\" id=\"cms16p2a-fill\"><\/div><\/div>\n <\/div>\n\n <div class=\"cq-grace\" id=\"cms16p2a-grace\">\n <div class=\"cq-grace-box\">\n <h3>Time's Up!<\/h3>\n <p>Submitting in<\/p>\n <div class=\"cq-grace-count\" id=\"cms16p2a-grace-count\">10<\/div>\n <button class=\"cq-grace-btn\" id=\"cms16p2a-grace-now\">Submit Now<\/button>\n <\/div>\n <\/div>\n\n <div class=\"cq-header\">\n <h1>Combined Medical Services Examination 2016<br>Paper II \u00b7 Part A<\/h1>\n <p>General Surgery<\/p>\n <div class=\"cq-meta\">\n <span class=\"cq-badge\">Questions 1 \u2013 40<\/span>\n <span class=\"cq-badge\">Options reshuffled<\/span>\n <button class=\"cq-timer-btn\" id=\"cms16p2a-timer-btn\">\u23f1 Start Timed Mode<\/button>\n <\/div>\n <\/div>\n\n <div class=\"cq-body\">\n <div id=\"cms16p2a-questions\"><\/div>\n <div class=\"cq-submit-wrap\">\n <button class=\"cq-btn\" id=\"cms16p2a-submit\">Submit Answers<\/button>\n <\/div>\n <div class=\"cq-score\" id=\"cms16p2a-score\">\n <div class=\"cq-score-ring\" id=\"cms16p2a-ring\">\n <div class=\"cq-ring-inner\">\n <span class=\"cq-ring-pct\" id=\"cms16p2a-ring-pct\">0%<\/span>\n <span class=\"cq-ring-sub\">score<\/span>\n <\/div>\n <\/div>\n <h2>Your Result<\/h2>\n <div class=\"cq-net-line\" id=\"cms16p2a-net-line\"><\/div>\n <div class=\"cq-verdict\" id=\"cms16p2a-verdict\"><\/div>\n <div class=\"cq-score-bands\">\n <span class=\"cq-band cq-band-c\" id=\"cms16p2a-ct-c\"><\/span>\n <span class=\"cq-band cq-band-w\" id=\"cms16p2a-ct-w\"><\/span>\n <span class=\"cq-band cq-band-s\" id=\"cms16p2a-ct-s\"><\/span>\n <\/div>\n <button class=\"cq-retry-btn\" id=\"cms16p2a-retry\">\u21ba Retry Quiz<\/button>\n <\/div>\n <\/div>\n\n<\/div>\n<script>\n(function(){\n 'use strict';\n const NS='cms16p2a', TOTAL=40, MAX=TOTAL*4;\n const TIMER_SECS=40*60;\n const GRACE_SECS=10;\n\n const QUESTIONS=[\n {\n id:1,\n stem:'In a sutured surgical wound, the process of epithelialisation is completed within:',\n correct:'48 hours',\n options:['24 hours','48 hours','72 hours','96 hours'],\n exp:'In a primarily sutured (well-approximated) wound, epithelialisation begins within hours as keratinocytes migrate across the wound surface from the wound edges. In a sutured incision with minimal gap, a continuous epithelial covering is restored within 24\u201348 hours. The answer is 48 hours. This initial seal is thin and fragile; full tensile strength takes weeks. In open (secondary intention) wounds, re-epithelialisation is far slower as cells must migrate longer distances.'\n },\n {\n id:2,\n stem:'Extensive surgical debridement, decompression or amputation may be indicated in all the following clinical settings EXCEPT:',\n correct:'Acute thrombophlebitis',\n options:['Progressive synergistic gangrene','Acute thrombophlebitis','Acute haemolytic streptococcal cellulitis','Acute rhabdomyolysis'],\n exp:'Progressive bacterial synergistic gangrene (Meleney\\'s gangrene), acute haemolytic streptococcal (necrotising) cellulitis\/fasciitis, and acute rhabdomyolysis with compartment syndrome all require urgent wide surgical debridement, fasciotomy, or amputation to remove necrotic tissue and prevent life-threatening sepsis. Acute thrombophlebitis (superficial vein thrombosis) is managed conservatively with anti-inflammatory drugs, compression, anticoagulation, and elevation \u2014 extensive surgery is NOT indicated.'\n },\n {\n id:3,\n stem:'Which one of the following bacteria is classified as a facultative anaerobe?',\n correct:'Escherichia',\n options:['Pseudomonas','Bacteroides','Escherichia','Clostridium'],\n exp:'A facultative anaerobe can grow in both the presence and absence of oxygen by switching between aerobic respiration and fermentation. E. coli (Escherichia) is the classic example \u2014 it thrives aerobically but can ferment anaerobically. Pseudomonas is an obligate aerobe (requires O\u2082). Bacteroides is an obligate anaerobe (killed by O\u2082). Clostridium is an obligate anaerobe (spore-forming). Only Escherichia is correctly classified as a facultative anaerobe.'\n },\n {\n id:4,\n stem:'Which of the following statements is NOT correct regarding sebaceous cyst?',\n correct:'Treatment is incision and drainage',\n options:['It has a punctum','Treatment is incision and drainage','Found on hairy areas of the body','Not found on palms and soles'],\n exp:'Sebaceous (epidermoid) cysts: arise from pilosebaceous follicles, therefore found on hairy areas (scalp, face, trunk) and NEVER on palms\/soles (which lack sebaceous glands). They have a characteristic central punctum (blocked follicle). Treatment is COMPLETE EXCISION of the cyst and its wall \u2014 mere incision and drainage (I&D) is INCORRECT because it leaves the lining behind, virtually guaranteeing recurrence. I&D may be done only for an acutely infected cyst as a temporising measure, followed later by excision.'\n },\n {\n id:5,\n stem:'Match List I (Carcinoma) with List II (Characteristic):\\nA. Seminoma testis\\nB. Carcinoma prostate\\nC. Basal cell carcinoma\\nD. Malignant melanoma\\n\\n1. Hormone dependent\\n2. Does not spread by lymphatics\\n3. Prognosis depends on thickness\\n4. Highly radiosensitive',\n correct:'A-4, B-1, C-2, D-3',\n options:['A-4, B-1, C-2, D-3','A-4, B-2, C-1, D-3','A-3, B-1, C-2, D-4','A-3, B-2, C-1, D-4'],\n exp:'Seminoma = highly radiosensitive (A=4) \u2014 responds dramatically to radiotherapy. Carcinoma prostate = hormone-dependent (A=1) \u2014 androgen deprivation (orchidectomy\/LHRH agonists) is mainstay treatment. Basal cell carcinoma = does not spread by lymphatics (C=2) \u2014 BCC invades locally and never metastasises via lymphatics; it is the most common skin cancer but least dangerous. Malignant melanoma = prognosis depends on Breslow thickness (D=3) \u2014 the primary prognostic determinant (Clark\\'s level also used).'\n },\n {\n id:6,\n stem:'Tumours of the anterior mediastinum include the following EXCEPT:',\n correct:'Schwannoma',\n options:['Thymoma','Lymphoma','Germ cell tumour','Schwannoma'],\n exp:'The anterior mediastinum (between sternum and pericardium) contains: thymus (thymoma, thymic carcinoma), lymph nodes (lymphoma \u2014 Hodgkin\\'s most common), germ cell tumours (teratoma, seminoma), and thyroid\/parathyroid tissue. The classic mnemonic is the \"4 Ts\": Thymoma, Teratoma (germ cell), Thyroid, Terrible lymphoma. Schwannoma (neurilemmoma) arises from peripheral nerve sheaths and is a classic POSTERIOR mediastinal tumour, originating from intercostal or sympathetic chain nerves.'\n },\n {\n id:7,\n stem:'In India, the commonest cause of unilateral lymphoedema of the lower limb is:',\n correct:'Filariasis',\n options:['Lymphoedema tarda','Carcinoma of penis','Filariasis','Tubercular lymphadenopathy'],\n exp:'In India and other tropical countries, filariasis (caused by Wuchereria bancrofti, transmitted by Culex mosquito) is by far the most common cause of secondary lymphoedema of the lower limb (and genitalia \u2014 hydrocele, elephantiasis). The adult worms obstruct lymphatic vessels causing chronic lymphatic obstruction, fibrosis, and progressive oedema. Lymphoedema tarda (primary) and carcinoma-related causes are secondary and less frequent. India has the world\\'s largest burden of lymphatic filariasis.'\n },\n {\n id:8,\n stem:'Nottingham Prognostic Index is used for:',\n correct:'Cancer breast',\n options:['Cancer stomach','Cancer colon','Cancer lung','Cancer breast'],\n exp:'The Nottingham Prognostic Index (NPI) is a validated scoring system for breast cancer prognosis, calculated as: NPI = 0.2 \u00d7 tumour size (cm) + lymph node stage (1\u20133) + histological grade (1\u20133). It stratifies patients into good, moderate, and poor prognostic groups and guides adjuvant therapy decisions. It was developed at the City Hospital, Nottingham. It is specific to breast cancer and has no role in stomach, colon, or lung cancer staging\/prognosis.'\n },\n {\n id:9,\n stem:'A patient has recurrent abdominal pain and jaundice. Blood investigations reveal reticulocytosis and hyperbilirubinaemia. What is the clinical diagnosis?',\n correct:'Hereditary spherocytosis',\n options:['Hereditary spherocytosis','Mirizzi\\'s syndrome','Choledochal cyst','Sclerosing cholangitis'],\n exp:'The triad of recurrent abdominal pain (biliary colic from pigment gallstones), obstructive jaundice (from common bile duct stones), and haemolytic anaemia markers (reticulocytosis + unconjugated hyperbilirubinaemia) points to hereditary spherocytosis. This autosomal dominant RBC membrane defect causes chronic haemolysis \u2192 excess bilirubin \u2192 pigment (calcium bilirubinate) gallstone formation at a young age. Mirizzi\\'s syndrome is extrinsic CBD compression from a stone in Hartmann\\'s pouch without haemolysis.'\n },\n {\n id:10,\n stem:'In gallstone ileus, obstruction most frequently occurs at:',\n correct:'Terminal ileum',\n options:['Duodenum','Jejunum','Proximal ileum','Terminal ileum'],\n exp:'Gallstone ileus is a mechanical small bowel obstruction caused by a large gallstone (>2.5 cm) that erodes through a cholecystoduodenal fistula and traverses the gut. As the stone tumbles distally, it passes through progressively narrowing intestinal segments and most commonly impacts at the TERMINAL ILEUM \u2014 the narrowest part of the small bowel just proximal to the ileocaecal valve. CXR shows Rigler\\'s triad: pneumobilia, bowel obstruction, and ectopic calcified gallstone.'\n },\n {\n id:11,\n stem:'The following conditions are associated with high incidence of pigment gallstones EXCEPT:',\n correct:'Prosthetic heart valve',\n options:['Cirrhosis','Ileal disease','Thalassaemia','Prosthetic heart valve'],\n exp:'Pigment (calcium bilirubinate) gallstones form when excess unconjugated bilirubin precipitates. Causes: chronic haemolysis (thalassaemia, sickle cell, spherocytosis), cirrhosis (impaired bilirubin conjugation + biliary stasis), and ileal disease\/resection (disrupts enterohepatic circulation \u2192 more deconjugation in colon \u2192 higher bilirubin pool). Prosthetic heart valves cause mechanical haemolysis but this is a MINOR cause not classically associated with pigment stones. The other three are well-established causes; prosthetic valve is the exception.'\n },\n {\n id:12,\n stem:'The most common route of spread in a case of pyogenic liver abscess is:',\n correct:'Ascending infection through biliary duct',\n options:['Haematogenous through portal vein','Ascending infection through biliary duct','Hepatic artery','Local spread'],\n exp:'In the current era, ascending cholangitis (ascending biliary infection) from biliary tract disease (choledocholithiasis, biliary strictures, ERCP-related, malignant obstruction) is the most common route of spread for pyogenic liver abscess in developed countries and increasingly in India. The portal vein route (pylephlebitis from appendicitis, diverticulitis) was historically the most common but is now less frequent due to early antibiotic treatment. Haematogenous via hepatic artery (systemic sepsis) and direct extension are less common.'\n },\n {\n id:13,\n stem:'The most common complication of pancreas divisum is:',\n correct:'Recurrent acute pancreatitis',\n options:['Obstructive jaundice','Duodenal obstruction','Recurrent acute pancreatitis','Peptic ulcer'],\n exp:'Pancreas divisum is the most common congenital pancreatic anomaly (failure of fusion of dorsal and ventral pancreatic buds). The dorsal duct (of Santorini) drains through the small minor papilla, which is often inadequate for the volume of pancreatic secretions. This relative outflow obstruction causes recurrent acute pancreatitis \u2014 the most common complication, presenting as episodic epigastric pain. Obstructive jaundice, duodenal obstruction, and peptic ulcer are not typical associations.'\n },\n {\n id:14,\n stem:'The commonest major surgical complication following Whipple\\'s procedure (pancreaticoduodenectomy) is:',\n correct:'Disruption of pancreatic anastomosis',\n options:['Disruption of pancreatic anastomosis','Biliary peritonitis','Disruption of gastric anastomosis','GI bleeding'],\n exp:'The Whipple procedure (pancreaticoduodenectomy) involves three anastomoses: pancreaticojejunostomy, hepaticojejunostomy, and gastrojejunostomy. The pancreatic anastomosis is the weakest link \u2014 the soft, friable pancreatic parenchyma and the enzyme-rich pancreatic juice make this anastomosis prone to leakage (pancreatic fistula). Post-operative pancreatic fistula (POPF) is the most common and most dreaded major complication, occurring in 10\u201330% of cases and responsible for the majority of post-Whipple morbidity and mortality.'\n },\n {\n id:15,\n stem:'A 60-year-old male presents with bleeding per rectum. Proctoscopy reveals 2nd degree haemorrhoids. The treatment of choice is:',\n correct:'Banding',\n options:['Cryotherapy','Sclerotherapy','Banding','Surgery'],\n exp:'Haemorrhoid treatment by degree: 1st degree (bleed, no prolapse) \u2192 sclerotherapy or banding. 2nd degree (prolapse but reduce spontaneously) \u2192 rubber band ligation (banding) is the treatment of choice \u2014 highly effective, minimal morbidity, outpatient procedure. 3rd degree (require manual reduction) \u2192 banding or surgery. 4th degree (irreducible) \u2192 surgery (haemorrhoidectomy). Sclerotherapy is more suited to 1st degree. Cryotherapy is no longer recommended. Banding (Barron\\'s band ligation) is optimal for 2nd degree haemorrhoids.'\n },\n {\n id:16,\n stem:'Treatment is recommended for H. pylori in association with the following EXCEPT:',\n correct:'Early gastric cancer',\n options:['Duodenal ulcer','Early gastric cancer','MALT lymphoma','Benign gastric ulcer'],\n exp:'Current indications for H. pylori eradication include: duodenal ulcer, gastric ulcer (benign), MALT lymphoma (eradication can induce complete remission in low-grade MALT lymphoma), functional dyspepsia, and first-degree relatives of gastric cancer patients. Early gastric cancer is treated by endoscopic mucosal resection or gastrectomy \u2014 H. pylori eradication is NOT the treatment for the cancer itself. While H. pylori eradication may reduce recurrence risk post-resection, it is not the treatment for early gastric cancer per se in this context.'\n },\n {\n id:17,\n stem:'Pott\\'s puffy tumour is a:',\n correct:'Subperiosteal abscess associated with osteomyelitis of frontal bone',\n options:['Tuberculosis of the skull bone','Squamous cell cancer of scalp','Subperiosteal abscess associated with osteomyelitis of frontal bone','Fungating scrotal malignancy'],\n exp:'Pott\\'s puffy tumour (described by Percivall Pott in 1760) is a subperiosteal abscess of the frontal bone associated with underlying frontal bone osteomyelitis, most commonly arising as a complication of frontal sinusitis. It presents as a doughy, fluctuant swelling over the forehead. It is a surgical emergency because it can spread intracranially causing epidural\/subdural abscess, meningitis, or brain abscess. Note: \"Pott\\'s disease\" (TB spine) is separate; Pott\\'s puffy tumour is specifically the frontal subperiosteal abscess.'\n },\n {\n id:18,\n stem:'With reference to frozen shoulder, consider the following statements:\\n1. It is associated with diabetes and heart disease.\\n2. It may follow minor trauma.\\n3. Its differential diagnoses are infection and fractures.\\n4. Treatment of choice is surgery.\\n\\nWhich of the statements given above are correct?',\n correct:'1, 2 and 3',\n options:['1 and 2 only','1, 2 and 3','2, 3 and 4','3 and 4 only'],\n exp:'Frozen shoulder (adhesive capsulitis): (1) Associated with diabetes mellitus (most important systemic association \u2014 10\u201320% of diabetics affected) and cardiac disease (post-MI immobilisation) \u2014 CORRECT. (2) Can be triggered by minor trauma, rotator cuff injury, or prolonged immobilisation \u2014 CORRECT. (3) Differential diagnoses include septic arthritis (infection) and fractures \u2014 CORRECT. (4) Treatment of choice is conservative \u2014 physiotherapy, intra-articular steroids, NSAIDs, and manipulation under anaesthesia. Surgery (arthroscopic capsular release) is reserved for refractory cases only \u2014 statement 4 is WRONG.'\n },\n {\n id:19,\n stem:'The prognosis in reduced or unreduced fractures involving the epiphyseal plate is very poor if the fracture line:',\n correct:'Crushes the epiphyseal plate',\n options:['Runs along the epiphyseal plate','Extends into epiphysis','Crushes the epiphyseal plate','Crosses the epiphyseal plate'],\n exp:'Salter-Harris classification of physeal (growth plate) fractures: Type I (along plate), Type II (through metaphysis + plate), Type III (into epiphysis), Type IV (crosses both), Type V (crush\/compression). Type V (Salter-Harris V) \u2014 direct axial compression crushing the growth plate \u2014 has the worst prognosis because it directly destroys the germinal layer of chondrocytes. This leads to premature physeal closure, leg length discrepancy, and angular deformity. It is often missed on X-ray at initial presentation.'\n },\n {\n id:20,\n stem:'A 30-year-old man presents with multiple rib fractures and paradoxical movement with severe respiratory distress. X-ray shows pulmonary contusion on the right side without pneumothorax or haemothorax. Which one of the following is the initial choice of treatment?',\n correct:'Endotracheal intubation and mechanical ventilation',\n options:['Immediate internal fixation','Endotracheal intubation and mechanical ventilation','Thoracic epidural analgesia and O\u2082 therapy','Stabilisation with towel clips'],\n exp:'Flail chest (paradoxical movement from \u22653 consecutive ribs fractured in \u22652 places) with pulmonary contusion and severe respiratory distress requires immediate airway control and IPPV (intermittent positive pressure ventilation) via endotracheal intubation. Positive pressure ventilation acts as internal pneumatic splinting of the flail segment and supports the contused lung. Thoracic epidural + O\u2082 is appropriate for MILD flail chest without severe distress. Internal fixation is elective. Towel clip stabilisation is an outdated method. Severe distress mandates immediate intubation and ventilation.'\n },\n {\n id:21,\n stem:'Which of the following is NOT a clinical feature of tetanus?',\n correct:'Loss of consciousness',\n options:['Risus sardonicus','Opisthotonus','Loss of consciousness','Respiratory failure'],\n exp:'Tetanus (Clostridium tetani toxin \u2014 tetanospasmin) causes spastic paralysis by blocking inhibitory interneurons (glycine\/GABA). Features: trismus (lockjaw), risus sardonicus (sardonic grin from facial spasm), opisthotonus (extreme back arching), generalised tonic-clonic spasms, and respiratory failure (from laryngospasm or respiratory muscle spasm). Crucially, tetanus does NOT cause loss of consciousness \u2014 the patient remains FULLY CONSCIOUS and aware throughout the painful spasms. This distinguishes it from meningitis and encephalitis.'\n },\n {\n id:22,\n stem:'Hyperchloraemic acidosis is a common complication of:',\n correct:'Ureterosigmoidostomy',\n options:['Ureterosigmoidostomy','Diarrhoea','Vomiting','Ileostomy'],\n exp:'Ureterosigmoidostomy (diversion of ureters into sigmoid colon) causes hyperchloraemic metabolic acidosis (normal anion gap). The colonic mucosa reabsorbs urinary chloride in exchange for bicarbonate secretion, and ammonia is reabsorbed, while bicarbonate is lost \u2014 resulting in hyperchloraemic, hypokalaemic acidosis (also hyponatraemia). This is the most dangerous metabolic complication of ureterosigmoidostomy, along with adenocarcinoma at the ureterocolic junction. Diarrhoea causes hyperchloraemic acidosis too, but vomiting causes metabolic alkalosis and ileostomy causes bicarbonate loss (acidosis but with normal\/low Cl).'\n },\n {\n id:23,\n stem:'Endoluminal probe for transrectal ultrasonography operates at the frequency of:',\n correct:'7.5 MHz',\n options:['2.5 MHz','5.0 MHz','7.5 MHz','15.0 MHz'],\n exp:'Transrectal ultrasound (TRUS) uses an endoluminal probe inserted into the rectum to image the prostate, rectal wall, and perirectal structures. The endoluminal probe operates at 7.5 MHz (range 5\u201310 MHz), providing high-resolution near-field imaging at the cost of limited depth penetration. This frequency gives excellent detail of the prostate layers, seminal vesicles, and neurovascular bundles. Lower frequencies (2.5\u20133.5 MHz) are for abdominal scanning (deeper structures). Higher frequencies (>10 MHz) are used for superficial structures like skin and vessels.'\n },\n {\n id:24,\n stem:'A Seldinger needle is used for:',\n correct:'Arteriography',\n options:['Liver biopsy','Breast biopsy','Lymphangiography','Arteriography'],\n exp:'The Seldinger technique (Sven-Ivar Seldinger, 1953) is the standard method for percutaneous vascular access: a needle punctures the vessel, a guidewire is threaded through the needle, the needle is withdrawn, and a catheter is passed over the guidewire into the vessel. The Seldinger needle is specifically used for arteriography (and venography\/central venous access). This technique revolutionised interventional radiology and is the basis of all percutaneous catheter-based procedures. Liver and breast biopsies use cutting needles; lymphangiography uses cut-down on lymphatics.'\n },\n {\n id:25,\n stem:'The ideal temperature to store whole blood in a blood bank is:',\n correct:'4\u00b0C',\n options:['-4\u00b0C','0\u00b0C','4\u00b0C','8\u00b0C'],\n exp:'Whole blood and packed red blood cells are stored at 2\u20136\u00b0C (optimally 4\u00b0C) in a monitored blood bank refrigerator. This temperature retards bacterial growth, slows RBC metabolic activity (2,3-DPG depletion, ATP decline), and prevents haemolysis. Shelf life is 21\u201335 days depending on the anticoagulant-preservative used (CPDA-1 = 35 days). Temperatures below 0\u00b0C would freeze and destroy RBCs. Above 6\u00b0C accelerates bacterial proliferation and haemolysis. Platelets are stored at 20\u201324\u00b0C (room temperature) with agitation.'\n },\n {\n id:26,\n stem:'Bisgaard treatment refers to that of:',\n correct:'Venous ulcer',\n options:['Ruptured tendo Achillis','Venous ulcer','An ischaemic ulcer','An in-growing toe nail'],\n exp:'Bisgaard\\'s method (Bisgaard regime) is a conservative treatment protocol for chronic venous ulcers, comprising: elevation of the limb, compression bandaging (graduated multi-layer bandaging), and exercises to promote the calf muscle pump. It was one of the early systematic approaches to managing varicose ulcers. It is specifically associated with venous (gravitational\/stasis) ulcers, which are the most common type of leg ulcer. Ischaemic ulcers require vascular reconstruction; compression is contraindicated in ischaemia.'\n },\n {\n id:27,\n stem:'Glasgow Coma Scale (GCS) score ranges between:',\n correct:'3 and 15',\n options:['0 and 15','1 and 15','2 and 15','3 and 15'],\n exp:'The Glasgow Coma Scale assesses three components: Eye opening (E: 1\u20134), Verbal response (V: 1\u20135), Motor response (M: 1\u20136). The minimum score is 1+1+1 = 3 (no eye opening, no verbal response, no motor response \u2014 deeply comatose or dead). The maximum score is 4+5+6 = 15 (fully conscious, orientated, obeying commands). A score of 0 is not possible on the GCS scale. GCS \u22648 indicates severe head injury and mandates airway protection. The range is therefore 3\u201315.'\n },\n {\n id:28,\n stem:'The most common cause of intestinal obstruction is:',\n correct:'Bands and adhesions',\n options:['Obstructed hernia','Inflammatory abdominal conditions','Gastrointestinal malignancy','Bands and adhesions'],\n exp:'Bands and adhesions (postoperative fibrous adhesions) are by far the most common cause of small bowel obstruction in adults in the developed world, accounting for ~60\u201370% of cases. They form after peritoneal surgery, inflammation, or infection. In countries with a high rate of abdominal surgery, adhesional obstruction predominates. Obstructed hernia is the most common cause in countries with limited surgical access. Malignancy is a common cause of large bowel obstruction. In children, intussusception and Meckel\\'s diverticulum are important causes.'\n },\n {\n id:29,\n stem:'The most common site for nosocomial (hospital-acquired) infection is:',\n correct:'Urinary tract',\n options:['Respiratory tract','Urinary tract','Surgical site','Blood stream'],\n exp:'Urinary tract infections (UTIs) are the most common nosocomial (healthcare-associated) infections, accounting for approximately 35\u201340% of all hospital-acquired infections. The vast majority are associated with urinary catheterisation (catheter-associated UTI, CAUTI). Catheterised patients develop bacteriuria at ~5% per day; virtually all catheterised patients have bacteriuria by 30 days. Common organisms: E. coli, Klebsiella, Pseudomonas, Enterococcus, Candida. Pneumonia (VAP) is second; surgical site infections third.'\n },\n {\n id:30,\n stem:'A patient has a carcinoid tumour of the appendix measuring more than 2.5 cm. The management of choice is:',\n correct:'Right hemicolectomy',\n options:['Appendicectomy','Appendicectomy and 24-hour urinary HIAA','Appendicectomy and abdominal CT scan','Right hemicolectomy'],\n exp:'Appendicular carcinoid management depends on tumour size: <1 cm (majority) \u2192 simple appendicectomy is curative (metastatic risk <2%). 1\u20132 cm \u2192 appendicectomy; right hemicolectomy if at base or with mesoappendix involvement. >2 cm (\u22652.5 cm) \u2192 RIGHT HEMICOLECTOMY is mandatory due to significantly increased risk of lymph node metastasis (up to 30%) and distant spread. Tumours >2.5 cm behave more aggressively and require formal oncological resection with lymph node clearance, just like a right-sided colon cancer.'\n },\n {\n id:31,\n stem:'What is the most common cause of intestinal obstruction in neonates?',\n correct:'Duodenal atresia',\n options:['Meconium ileus','Duodenal atresia','Volvulus neonatorum','Hirschsprung\\'s disease'],\n exp:'Duodenal atresia is the most common cause of neonatal intestinal obstruction, occurring in approximately 1 in 5,000\u201310,000 live births. It results from failure of recanalisation of the duodenal lumen during embryogenesis. Presents within hours of birth with bilious vomiting. X-ray shows the pathognomonic \"double bubble\" sign (distended stomach and proximal duodenum). Often associated with Down syndrome (30% of cases) and other anomalies. Meconium ileus is specific to cystic fibrosis. Hirschsprung\\'s is the most common cause of neonatal large bowel obstruction.'\n },\n {\n id:32,\n stem:'Match List I (Drug) with List II (Complication):\\nA. Cisplatin\\nB. Adriamycin\\nC. Bleomycin\\nD. Cyclophosphamide\\n\\n1. Haemorrhagic cystitis\\n2. Pulmonary fibrosis\\n3. Cardiomyopathy\\n4. Tubular necrosis',\n correct:'A-4, B-3, C-2, D-1',\n options:['A-3, B-4, C-2, D-1','A-4, B-3, C-1, D-2','A-3, B-4, C-1, D-2','A-4, B-3, C-2, D-1'],\n exp:'Cisplatin = nephrotoxicity (renal tubular necrosis) \u2014 requires aggressive hydration (A=4). Adriamycin (doxorubicin) = dose-dependent cardiomyopathy\/dilated CM \u2014 maximum lifetime dose 550 mg\/m\u00b2 (B=3). Bleomycin = pulmonary fibrosis (interstitial pneumonitis) + cutaneous toxicity \u2014 lung is the dose-limiting organ (C=2). Cyclophosphamide = haemorrhagic cystitis from acrolein metabolite \u2014 prevented with MESNA (D=1). These four drug-toxicity pairings are classic pharmacology examination facts.'\n },\n {\n id:33,\n stem:'Consider the following statements about Haemophilia A and Haemophilia B (Christmas disease):\\n1. Are variants of the same disease process.\\n2. Are due to congenital deficiency of factor VIII and factor IX respectively.\\n3. Both are sex-linked characteristics transmitted by asymptomatic females.\\n4. Can occur both in males and females.\\n\\nSelect the correct answer:',\n correct:'2 and 3',\n options:['2 and 3','1, 2 and 4','2 only','3 only'],\n exp:'Statement 1 is WRONG: Haemophilia A (factor VIII deficiency) and B (factor IX deficiency) are DIFFERENT diseases caused by mutations in different genes on the X chromosome \u2014 not variants of one process. Statement 2 is CORRECT: Haem A = factor VIII deficiency; Haem B = factor IX deficiency. Statement 3 is CORRECT: Both are X-linked recessive \u2014 carried on the X chromosome, transmitted by carrier females who are clinically normal (asymptomatic). Statement 4: Females can be affected only if homozygous (very rare \u2014 e.g., daughter of affected father and carrier mother), so \"can occur in females\" is technically true but 4 is typically listed as incorrect in this context since the question pairs it with statement 1. The best answer is 2 and 3.'\n },\n {\n id:34,\n stem:'A 30-year-old lady sustained a chest injury and presented with massive haemothorax on the right side. Tube thoracostomy drained 1800 ml of blood. What is the most appropriate treatment?',\n correct:'Resuscitation and prepare for urgent thoracotomy',\n options:['Correction of hypovolaemic shock','Put one more chest tube','Clamp the chest tube to cause tamponade','Resuscitation and prepare for urgent thoracotomy'],\n exp:'Indications for urgent thoracotomy in haemothorax: initial drainage >1500 ml (massive haemothorax on initial tube insertion) OR ongoing loss >200 ml\/hour for 2\u20134 hours OR haemodynamic instability despite resuscitation. This patient drained 1800 ml \u2014 exceeding the 1500 ml threshold for urgent thoracotomy. The management is simultaneous resuscitation (blood transfusion, IV fluids) while preparing for emergency thoracotomy to identify and control the bleeding source (often intercostal or internal mammary vessel, or lung laceration). Clamping the tube is dangerous (promotes clotted haemothorax and tamponade).'\n },\n {\n id:35,\n stem:'In a case of obstructed hernia, strangulation is suggested by which of the following?\\n1. Presence of shock\\n2. Pain is never completely absent\\n3. Localised tenderness associated with rebound tenderness\\n4. Pain persists despite conservative management\\n5. An external hernia becomes tense, tender, irreducible with recent increase in size\\n\\nSelect the correct answer:',\n correct:'1, 2, 3, 4 and 5',\n options:['1, 2, 3 and 4 only','1, 2, 4 and 5 only','1, 3 and 5 only','1, 2, 3, 4 and 5'],\n exp:'All five features suggest strangulation in an obstructed hernia: (1) Shock = ischaemia\/necrosis \u2192 septicaemia\/endotoxaemia. (2) In simple obstruction, colic is intermittent; in strangulation, pain is constant and never fully absent due to ischaemic infarction. (3) Localised tenderness with rebound = peritoneal irritation from ischaemia\/perforation. (4) Pain persisting despite conservative management suggests irreversible ischaemia. (5) A tense, tender, irreducible hernia with recent increase in size is the classic clinical picture of strangulation. All five correctly identify strangulation.'\n },\n {\n id:36,\n stem:'Regarding haemorrhagic shock, which one of the following statements is correct?',\n correct:'Loss of 40% of circulating volume is life threatening',\n options:['Clinically manifested when >10% of total blood volume is lost','Tachycardia presents in 100% of hypovolaemic patients','Loss of 40% of circulating volume is life threatening','In acute stage of shock, systemic vasodilation becomes evident'],\n exp:'ATLS classification of haemorrhagic shock: Class I (<15% volume lost) \u2014 minimal signs, no tachycardia necessarily. Class II (15\u201330%) \u2014 tachycardia, anxiety. Class III (30\u201340%) \u2014 marked tachycardia, hypotension, confusion. Class IV (>40%) \u2014 immediately life-threatening, severe hypotension, altered consciousness, imminent death. Option C is correct: loss of \u226540% is life-threatening. Option A is wrong (Class I loss of 10% may be asymptomatic). Option B is wrong (tachycardia is absent in Class I). Option D is wrong (shock causes vasoCONSTRICTION, not vasodilation).'\n },\n {\n id:37,\n stem:'Poor prognostic indicators in advanced germ cell tumours show:\\n1. Primary sites in mediastinum\\n2. Non-pulmonary metastasis\\n3. Lactate dehydrogenase more than 10 times the normal value\\n\\nWhich of the statements given above are correct?',\n correct:'1, 2 and 3',\n options:['1, 2 and 3','2 and 3 only','1 and 3 only','1 and 2 only'],\n exp:'The IGCCCG (International Germ Cell Cancer Collaborative Group) classification defines poor prognosis germ cell tumours by: (1) Non-gonadal primary site (mediastinal primary, retroperitoneal) \u2014 correct. (2) Non-pulmonary visceral metastases (liver, bone, brain) \u2014 correct; pulmonary-only metastases are better prognosis. (3) Very high tumour markers \u2014 AFP >10,000 IU\/mL, HCG >50,000 IU\/mL, or LDH >10\u00d7 upper limit of normal \u2014 correct. All three are valid poor prognostic criteria in the IGCCCG classification.'\n },\n {\n id:38,\n stem:'Which one of the following structures is NOT removed during a classical radical neck dissection?',\n correct:'Trapezius',\n options:['Trapezius','Sternocleidomastoid','Internal jugular vein','Accessory nerve'],\n exp:'Classical radical neck dissection (Crile\\'s operation) removes: all five lymph node levels, sternocleidomastoid muscle, internal jugular vein, and spinal accessory nerve (CN XI). The TRAPEZIUS muscle is NOT removed in radical neck dissection \u2014 it is the muscle that is DENERVATED when the accessory nerve is sacrificed (causing shoulder drop), but the trapezius itself remains. Modified radical neck dissection preserves one or more of the non-lymphatic structures (SCM, IJV, CN XI) to reduce morbidity while achieving equivalent oncological control.'\n },\n {\n id:39,\n stem:'Mousseau-Barbin tube is used for:',\n correct:'Advanced cancer oesophagus',\n options:['Advanced cancer stomach','Advanced cancer oesophagus','Advanced cancer oropharynx','All of these'],\n exp:'The Mousseau-Barbin tube (M-B tube) is a plastic pulsion prosthesis (intubation tube) that is passed through a malignant oesophageal stricture in inoperable\/advanced oesophageal carcinoma to maintain luminal patency and allow swallowing (especially liquids). It is a palliative intervention, providing relief of dysphagia in patients who are not surgical candidates. Modern self-expanding metallic stents (SEMS) have largely replaced M-B tubes, but the concept and instrument remain examination topics. It is specific to oesophageal cancer, not gastric or oropharyngeal.'\n },\n {\n id:40,\n stem:'Which one of the following is the investigation of choice in a patient with haematemesis?',\n correct:'Flexible upper gastrointestinal endoscopy',\n options:['Flexible upper gastrointestinal endoscopy','Barium meal for stomach and duodenum','Contrast-enhanced CT scan','Selective left gastric angiography'],\n exp:'Upper GI endoscopy (oesophagogastroduodenoscopy, OGD) is the gold standard investigation for haematemesis. It is both diagnostic (identifies the bleeding source in >90% of cases \u2014 peptic ulcer, varices, Mallory-Weiss tear, oesophagitis) and therapeutic (injection, heat probe, banding, clipping). It should be performed within 24 hours (or urgently if haemodynamically unstable). Barium meal is contraindicated in acute bleeding. CT angiography is used when endoscopy is negative or unavailable. Angiography is reserved for refractory bleeding not amenable to endoscopic control.'\n }\n ];\n\n function shuffle(arr){\n const a=[...arr];\n for(let i=a.length-1;i>0;i--){const j=Math.floor(Math.random()*(i+1));[a[i],a[j]]=[a[j],a[i]];}\n return a;\n }\n\n const LETTERS=['A','B','C','D'];\n let userAnswers={}, answered=0, shuffledOpts={};\n let timerRunning=false, timerRemaining=TIMER_SECS, timerInterval=null, graceInterval=null;\n let quizSubmitted=false;\n\n function fmtTime(s){\n const m=Math.floor(s\/60), sec=s%60;\n return String(m).padStart(2,'0')+':'+String(sec).padStart(2,'0');\n }\n\n function startTimer(){\n if(timerRunning||quizSubmitted)return;\n timerRunning=true;\n const btn=document.getElementById(NS+'-timer-btn');\n btn.textContent='\u23f1 '+fmtTime(timerRemaining);\n btn.classList.add('running');\n document.getElementById(NS+'-timer-item').classList.add('active');\n timerInterval=setInterval(function(){\n timerRemaining--;\n const disp=fmtTime(timerRemaining);\n document.getElementById(NS+'-timer-display').textContent=disp;\n btn.textContent='\u23f1 '+disp;\n const item=document.getElementById(NS+'-timer-item');\n if(timerRemaining<=300) item.classList.add('warning');\n if(timerRemaining<=0){clearInterval(timerInterval);timerInterval=null;triggerGrace();}\n },1000);\n }\n\n function stopTimer(){\n if(timerInterval){clearInterval(timerInterval);timerInterval=null;}\n timerRunning=false;\n }\n\n function triggerGrace(){\n if(quizSubmitted)return;\n let g=GRACE_SECS;\n document.getElementById(NS+'-grace-count').textContent=g;\n document.getElementById(NS+'-grace').classList.add('show');\n graceInterval=setInterval(function(){\n g--;\n document.getElementById(NS+'-grace-count').textContent=g;\n if(g<=0){clearInterval(graceInterval);dismissGrace();showScore();}\n },1000);\n }\n\n function dismissGrace(){\n document.getElementById(NS+'-grace').classList.remove('show');\n if(graceInterval){clearInterval(graceInterval);graceInterval=null;}\n }\n\n function build(){\n const container=document.getElementById(NS+'-questions');\n container.innerHTML='';\n userAnswers={};answered=0;shuffledOpts={};\n quizSubmitted=false;timerRunning=false;timerRemaining=TIMER_SECS;\n stopTimer();\n if(graceInterval){clearInterval(graceInterval);graceInterval=null;}\n dismissGrace();\n document.getElementById(NS+'-score').style.display='none';\n document.getElementById(NS+'-timer-item').classList.remove('active','warning');\n const btn=document.getElementById(NS+'-timer-btn');\n btn.textContent='\u23f1 Start Timed Mode';btn.classList.remove('running');\n document.getElementById(NS+'-timer-display').textContent=fmtTime(TIMER_SECS);\n updateStats();\n\n QUESTIONS.forEach(function(q){\n const opts=shuffle(q.options);shuffledOpts[q.id]=opts;\n const card=document.createElement('div');card.className='cq-card';\n card.innerHTML=\n '<div class=\"cq-qhead\">'+\n '<div class=\"cq-qnum\" id=\"'+NS+'-n'+q.id+'\">'+q.id+'<\/div>'+\n '<div 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content:'';position:absolute;width:86px;height:86px;\n border-radius:50%;background:var(--white);\n}\n#cms16p2a .cq-ring-inner{position:relative;display:flex;flex-direction:column;align-items:center;line-height:1.2}\n#cms16p2a .cq-ring-pct{font-family:'Playfair Display',serif;font-size:1.3rem;font-weight:700;color:var(--teal)}\n#cms16p2a .cq-ring-sub{font-size:0.6rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:0.05em}\n#cms16p2a .cq-score h2{font-family:'Playfair Display',serif;font-size:1.2rem;color:var(--ink);margin-bottom:8px}\n#cms16p2a .cq-net-line{font-size:1rem;color:var(--teal);font-weight:600;margin-bottom:6px}\n#cms16p2a .cq-verdict{font-size:0.85rem;color:var(--ink-soft);margin-bottom:20px}\n#cms16p2a .cq-score-bands{display:flex;justify-content:center;gap:10px;flex-wrap:wrap;font-size:0.8rem}\n#cms16p2a .cq-band{padding:4px 12px;border-radius:16px;font-weight:600}\n#cms16p2a .cq-band-c{background:var(--correct-bg);color:var(--correct)}\n#cms16p2a .cq-band-w{background:var(--wrong-bg);color:var(--wrong)}\n#cms16p2a .cq-band-s{background:var(--teal-pale);color:var(--teal)}\n#cms16p2a .cq-retry-btn{\n margin-top:22px;background:transparent;border:2px solid var(--teal);\n color:var(--teal);border-radius:8px;padding:10px 28px;\n font-family:'Playfair Display',serif;font-size:0.95rem;font-weight:700;\n cursor:pointer;transition:background 0.2s,color 0.2s;\n}\n#cms16p2a .cq-retry-btn:hover{background:var(--teal);color:var(--white)}\n\n@media(max-width:480px){\n #cms16p2a .cq-header h1{font-size:1.15rem}\n #cms16p2a .cq-qtext{font-size:0.88rem}\n #cms16p2a .cq-opt-text{font-size:0.84rem}\n}\n<\/style>\n<\/head>\n<body>\n<div id=\"cms16p2a\">\n\n <div class=\"cq-sentinel\" id=\"cms16p2a-sentinel\"><\/div>\n\n <div class=\"cq-statusbar\" id=\"cms16p2a-statusbar\">\n <div class=\"cq-sb-stats\">\n <div class=\"cq-timer-item\" id=\"cms16p2a-timer-item\">\u23f1 <strong id=\"cms16p2a-timer-display\">40:00<\/strong><\/div>\n <div class=\"cq-sb-item\">\u2705 <strong id=\"cms16p2a-sc\">0<\/strong><\/div>\n <div class=\"cq-sb-item\">\u274c <strong id=\"cms16p2a-sw\">0<\/strong><\/div>\n <div class=\"cq-sb-item\">\u23f3 <strong id=\"cms16p2a-sr\">40<\/strong> left<\/div>\n <div class=\"cq-sb-sep\"><\/div>\n <div class=\"cq-sb-item\">Net <strong id=\"cms16p2a-sn\">0<\/strong> \/ <strong id=\"cms16p2a-sm\">160<\/strong><\/div>\n <\/div>\n <div class=\"cq-sb-progress\"><div class=\"cq-sb-fill\" id=\"cms16p2a-fill\"><\/div><\/div>\n <\/div>\n\n <div class=\"cq-grace\" id=\"cms16p2a-grace\">\n <div class=\"cq-grace-box\">\n <h3>Time's Up!<\/h3>\n <p>Submitting in<\/p>\n <div class=\"cq-grace-count\" id=\"cms16p2a-grace-count\">10<\/div>\n <button class=\"cq-grace-btn\" id=\"cms16p2a-grace-now\">Submit Now<\/button>\n <\/div>\n <\/div>\n\n <div class=\"cq-header\">\n <h1>Combined Medical Services Examination 2016<br>Paper II \u00b7 Part A<\/h1>\n <p>General Surgery<\/p>\n <div class=\"cq-meta\">\n <span class=\"cq-badge\">Questions 1 \u2013 40<\/span>\n <span class=\"cq-badge\">Options reshuffled<\/span>\n <button class=\"cq-timer-btn\" id=\"cms16p2a-timer-btn\">\u23f1 Start Timed Mode<\/button>\n <\/div>\n <\/div>\n\n <div class=\"cq-body\">\n <div id=\"cms16p2a-questions\"><\/div>\n <div class=\"cq-submit-wrap\">\n <button class=\"cq-btn\" id=\"cms16p2a-submit\">Submit Answers<\/button>\n <\/div>\n <div class=\"cq-score\" id=\"cms16p2a-score\">\n <div class=\"cq-score-ring\" id=\"cms16p2a-ring\">\n <div class=\"cq-ring-inner\">\n <span class=\"cq-ring-pct\" id=\"cms16p2a-ring-pct\">0%<\/span>\n <span class=\"cq-ring-sub\">score<\/span>\n <\/div>\n <\/div>\n <h2>Your Result<\/h2>\n <div class=\"cq-net-line\" id=\"cms16p2a-net-line\"><\/div>\n <div class=\"cq-verdict\" id=\"cms16p2a-verdict\"><\/div>\n <div class=\"cq-score-bands\">\n <span class=\"cq-band cq-band-c\" id=\"cms16p2a-ct-c\"><\/span>\n <span class=\"cq-band cq-band-w\" id=\"cms16p2a-ct-w\"><\/span>\n <span class=\"cq-band cq-band-s\" id=\"cms16p2a-ct-s\"><\/span>\n <\/div>\n <button class=\"cq-retry-btn\" id=\"cms16p2a-retry\">\u21ba Retry Quiz<\/button>\n <\/div>\n <\/div>\n\n<\/div>\n<script>\n(function(){\n 'use strict';\n const NS='cms16p2a', TOTAL=40, MAX=TOTAL*4;\n const TIMER_SECS=40*60;\n const GRACE_SECS=10;\n\n const QUESTIONS=[\n {\n id:1,\n stem:'In a sutured surgical wound, the process of epithelialisation is completed within:',\n correct:'48 hours',\n options:['24 hours','48 hours','72 hours','96 hours'],\n exp:'In a primarily sutured (well-approximated) wound, epithelialisation begins within hours as keratinocytes migrate across the wound surface from the wound edges. In a sutured incision with minimal gap, a continuous epithelial covering is restored within 24\u201348 hours. The answer is 48 hours. This initial seal is thin and fragile; full tensile strength takes weeks. In open (secondary intention) wounds, re-epithelialisation is far slower as cells must migrate longer distances.'\n },\n {\n id:2,\n stem:'Extensive surgical debridement, decompression or amputation may be indicated in all the following clinical settings EXCEPT:',\n correct:'Acute thrombophlebitis',\n options:['Progressive synergistic gangrene','Acute thrombophlebitis','Acute haemolytic streptococcal cellulitis','Acute rhabdomyolysis'],\n exp:'Progressive bacterial synergistic gangrene (Meleney\\'s gangrene), acute haemolytic streptococcal (necrotising) cellulitis\/fasciitis, and acute rhabdomyolysis with compartment syndrome all require urgent wide surgical debridement, fasciotomy, or amputation to remove necrotic tissue and prevent life-threatening sepsis. Acute thrombophlebitis (superficial vein thrombosis) is managed conservatively with anti-inflammatory drugs, compression, anticoagulation, and elevation \u2014 extensive surgery is NOT indicated.'\n },\n {\n id:3,\n stem:'Which one of the following bacteria is classified as a facultative anaerobe?',\n correct:'Escherichia',\n options:['Pseudomonas','Bacteroides','Escherichia','Clostridium'],\n exp:'A facultative anaerobe can grow in both the presence and absence of oxygen by switching between aerobic respiration and fermentation. E. coli (Escherichia) is the classic example \u2014 it thrives aerobically but can ferment anaerobically. Pseudomonas is an obligate aerobe (requires O\u2082). Bacteroides is an obligate anaerobe (killed by O\u2082). Clostridium is an obligate anaerobe (spore-forming). Only Escherichia is correctly classified as a facultative anaerobe.'\n },\n {\n id:4,\n stem:'Which of the following statements is NOT correct regarding sebaceous cyst?',\n correct:'Treatment is incision and drainage',\n options:['It has a punctum','Treatment is incision and drainage','Found on hairy areas of the body','Not found on palms and soles'],\n exp:'Sebaceous (epidermoid) cysts: arise from pilosebaceous follicles, therefore found on hairy areas (scalp, face, trunk) and NEVER on palms\/soles (which lack sebaceous glands). They have a characteristic central punctum (blocked follicle). Treatment is COMPLETE EXCISION of the cyst and its wall \u2014 mere incision and drainage (I&D) is INCORRECT because it leaves the lining behind, virtually guaranteeing recurrence. I&D may be done only for an acutely infected cyst as a temporising measure, followed later by excision.'\n },\n {\n id:5,\n stem:'Match List I (Carcinoma) with List II (Characteristic):\\nA. Seminoma testis\\nB. Carcinoma prostate\\nC. Basal cell carcinoma\\nD. Malignant melanoma\\n\\n1. Hormone dependent\\n2. Does not spread by lymphatics\\n3. Prognosis depends on thickness\\n4. Highly radiosensitive',\n correct:'A-4, B-1, C-2, D-3',\n options:['A-4, B-1, C-2, D-3','A-4, B-2, C-1, D-3','A-3, B-1, C-2, D-4','A-3, B-2, C-1, D-4'],\n exp:'Seminoma = highly radiosensitive (A=4) \u2014 responds dramatically to radiotherapy. Carcinoma prostate = hormone-dependent (A=1) \u2014 androgen deprivation (orchidectomy\/LHRH agonists) is mainstay treatment. Basal cell carcinoma = does not spread by lymphatics (C=2) \u2014 BCC invades locally and never metastasises via lymphatics; it is the most common skin cancer but least dangerous. Malignant melanoma = prognosis depends on Breslow thickness (D=3) \u2014 the primary prognostic determinant (Clark\\'s level also used).'\n },\n {\n id:6,\n stem:'Tumours of the anterior mediastinum include the following EXCEPT:',\n correct:'Schwannoma',\n options:['Thymoma','Lymphoma','Germ cell tumour','Schwannoma'],\n exp:'The anterior mediastinum (between sternum and pericardium) contains: thymus (thymoma, thymic carcinoma), lymph nodes (lymphoma \u2014 Hodgkin\\'s most common), germ cell tumours (teratoma, seminoma), and thyroid\/parathyroid tissue. The classic mnemonic is the \"4 Ts\": Thymoma, Teratoma (germ cell), Thyroid, Terrible lymphoma. Schwannoma (neurilemmoma) arises from peripheral nerve sheaths and is a classic POSTERIOR mediastinal tumour, originating from intercostal or sympathetic chain nerves.'\n },\n {\n id:7,\n stem:'In India, the commonest cause of unilateral lymphoedema of the lower limb is:',\n correct:'Filariasis',\n options:['Lymphoedema tarda','Carcinoma of penis','Filariasis','Tubercular lymphadenopathy'],\n exp:'In India and other tropical countries, filariasis (caused by Wuchereria bancrofti, transmitted by Culex mosquito) is by far the most common cause of secondary lymphoedema of the lower limb (and genitalia \u2014 hydrocele, elephantiasis). The adult worms obstruct lymphatic vessels causing chronic lymphatic obstruction, fibrosis, and progressive oedema. Lymphoedema tarda (primary) and carcinoma-related causes are secondary and less frequent. India has the world\\'s largest burden of lymphatic filariasis.'\n },\n {\n id:8,\n stem:'Nottingham Prognostic Index is used for:',\n correct:'Cancer breast',\n options:['Cancer stomach','Cancer colon','Cancer lung','Cancer breast'],\n exp:'The Nottingham Prognostic Index (NPI) is a validated scoring system for breast cancer prognosis, calculated as: NPI = 0.2 \u00d7 tumour size (cm) + lymph node stage (1\u20133) + histological grade (1\u20133). It stratifies patients into good, moderate, and poor prognostic groups and guides adjuvant therapy decisions. It was developed at the City Hospital, Nottingham. It is specific to breast cancer and has no role in stomach, colon, or lung cancer staging\/prognosis.'\n },\n {\n id:9,\n stem:'A patient has recurrent abdominal pain and jaundice. Blood investigations reveal reticulocytosis and hyperbilirubinaemia. What is the clinical diagnosis?',\n correct:'Hereditary spherocytosis',\n options:['Hereditary spherocytosis','Mirizzi\\'s syndrome','Choledochal cyst','Sclerosing cholangitis'],\n exp:'The triad of recurrent abdominal pain (biliary colic from pigment gallstones), obstructive jaundice (from common bile duct stones), and haemolytic anaemia markers (reticulocytosis + unconjugated hyperbilirubinaemia) points to hereditary spherocytosis. This autosomal dominant RBC membrane defect causes chronic haemolysis \u2192 excess bilirubin \u2192 pigment (calcium bilirubinate) gallstone formation at a young age. Mirizzi\\'s syndrome is extrinsic CBD compression from a stone in Hartmann\\'s pouch without haemolysis.'\n },\n {\n id:10,\n stem:'In gallstone ileus, obstruction most frequently occurs at:',\n correct:'Terminal ileum',\n options:['Duodenum','Jejunum','Proximal ileum','Terminal ileum'],\n exp:'Gallstone ileus is a mechanical small bowel obstruction caused by a large gallstone (>2.5 cm) that erodes through a cholecystoduodenal fistula and traverses the gut. As the stone tumbles distally, it passes through progressively narrowing intestinal segments and most commonly impacts at the TERMINAL ILEUM \u2014 the narrowest part of the small bowel just proximal to the ileocaecal valve. CXR shows Rigler\\'s triad: pneumobilia, bowel obstruction, and ectopic calcified gallstone.'\n },\n {\n id:11,\n stem:'The following conditions are associated with high incidence of pigment gallstones EXCEPT:',\n correct:'Prosthetic heart valve',\n options:['Cirrhosis','Ileal disease','Thalassaemia','Prosthetic heart valve'],\n exp:'Pigment (calcium bilirubinate) gallstones form when excess unconjugated bilirubin precipitates. Causes: chronic haemolysis (thalassaemia, sickle cell, spherocytosis), cirrhosis (impaired bilirubin conjugation + biliary stasis), and ileal disease\/resection (disrupts enterohepatic circulation \u2192 more deconjugation in colon \u2192 higher bilirubin pool). Prosthetic heart valves cause mechanical haemolysis but this is a MINOR cause not classically associated with pigment stones. The other three are well-established causes; prosthetic valve is the exception.'\n },\n {\n id:12,\n stem:'The most common route of spread in a case of pyogenic liver abscess is:',\n correct:'Ascending infection through biliary duct',\n options:['Haematogenous through portal vein','Ascending infection through biliary duct','Hepatic artery','Local spread'],\n exp:'In the current era, ascending cholangitis (ascending biliary infection) from biliary tract disease (choledocholithiasis, biliary strictures, ERCP-related, malignant obstruction) is the most common route of spread for pyogenic liver abscess in developed countries and increasingly in India. The portal vein route (pylephlebitis from appendicitis, diverticulitis) was historically the most common but is now less frequent due to early antibiotic treatment. Haematogenous via hepatic artery (systemic sepsis) and direct extension are less common.'\n },\n {\n id:13,\n stem:'The most common complication of pancreas divisum is:',\n correct:'Recurrent acute pancreatitis',\n options:['Obstructive jaundice','Duodenal obstruction','Recurrent acute pancreatitis','Peptic ulcer'],\n exp:'Pancreas divisum is the most common congenital pancreatic anomaly (failure of fusion of dorsal and ventral pancreatic buds). The dorsal duct (of Santorini) drains through the small minor papilla, which is often inadequate for the volume of pancreatic secretions. This relative outflow obstruction causes recurrent acute pancreatitis \u2014 the most common complication, presenting as episodic epigastric pain. Obstructive jaundice, duodenal obstruction, and peptic ulcer are not typical associations.'\n },\n {\n id:14,\n stem:'The commonest major surgical complication following Whipple\\'s procedure (pancreaticoduodenectomy) is:',\n correct:'Disruption of pancreatic anastomosis',\n options:['Disruption of pancreatic anastomosis','Biliary peritonitis','Disruption of gastric anastomosis','GI bleeding'],\n exp:'The Whipple procedure (pancreaticoduodenectomy) involves three anastomoses: pancreaticojejunostomy, hepaticojejunostomy, and gastrojejunostomy. The pancreatic anastomosis is the weakest link \u2014 the soft, friable pancreatic parenchyma and the enzyme-rich pancreatic juice make this anastomosis prone to leakage (pancreatic fistula). Post-operative pancreatic fistula (POPF) is the most common and most dreaded major complication, occurring in 10\u201330% of cases and responsible for the majority of post-Whipple morbidity and mortality.'\n },\n {\n id:15,\n stem:'A 60-year-old male presents with bleeding per rectum. Proctoscopy reveals 2nd degree haemorrhoids. The treatment of choice is:',\n correct:'Banding',\n options:['Cryotherapy','Sclerotherapy','Banding','Surgery'],\n exp:'Haemorrhoid treatment by degree: 1st degree (bleed, no prolapse) \u2192 sclerotherapy or banding. 2nd degree (prolapse but reduce spontaneously) \u2192 rubber band ligation (banding) is the treatment of choice \u2014 highly effective, minimal morbidity, outpatient procedure. 3rd degree (require manual reduction) \u2192 banding or surgery. 4th degree (irreducible) \u2192 surgery (haemorrhoidectomy). Sclerotherapy is more suited to 1st degree. Cryotherapy is no longer recommended. Banding (Barron\\'s band ligation) is optimal for 2nd degree haemorrhoids.'\n },\n {\n id:16,\n stem:'Treatment is recommended for H. pylori in association with the following EXCEPT:',\n correct:'Early gastric cancer',\n options:['Duodenal ulcer','Early gastric cancer','MALT lymphoma','Benign gastric ulcer'],\n exp:'Current indications for H. pylori eradication include: duodenal ulcer, gastric ulcer (benign), MALT lymphoma (eradication can induce complete remission in low-grade MALT lymphoma), functional dyspepsia, and first-degree relatives of gastric cancer patients. Early gastric cancer is treated by endoscopic mucosal resection or gastrectomy \u2014 H. pylori eradication is NOT the treatment for the cancer itself. While H. pylori eradication may reduce recurrence risk post-resection, it is not the treatment for early gastric cancer per se in this context.'\n },\n {\n id:17,\n stem:'Pott\\'s puffy tumour is a:',\n correct:'Subperiosteal abscess associated with osteomyelitis of frontal bone',\n options:['Tuberculosis of the skull bone','Squamous cell cancer of scalp','Subperiosteal abscess associated with osteomyelitis of frontal bone','Fungating scrotal malignancy'],\n exp:'Pott\\'s puffy tumour (described by Percivall Pott in 1760) is a subperiosteal abscess of the frontal bone associated with underlying frontal bone osteomyelitis, most commonly arising as a complication of frontal sinusitis. It presents as a doughy, fluctuant swelling over the forehead. It is a surgical emergency because it can spread intracranially causing epidural\/subdural abscess, meningitis, or brain abscess. Note: \"Pott\\'s disease\" (TB spine) is separate; Pott\\'s puffy tumour is specifically the frontal subperiosteal abscess.'\n },\n {\n id:18,\n stem:'With reference to frozen shoulder, consider the following statements:\\n1. It is associated with diabetes and heart disease.\\n2. It may follow minor trauma.\\n3. Its differential diagnoses are infection and fractures.\\n4. Treatment of choice is surgery.\\n\\nWhich of the statements given above are correct?',\n correct:'1, 2 and 3',\n options:['1 and 2 only','1, 2 and 3','2, 3 and 4','3 and 4 only'],\n exp:'Frozen shoulder (adhesive capsulitis): (1) Associated with diabetes mellitus (most important systemic association \u2014 10\u201320% of diabetics affected) and cardiac disease (post-MI immobilisation) \u2014 CORRECT. (2) Can be triggered by minor trauma, rotator cuff injury, or prolonged immobilisation \u2014 CORRECT. (3) Differential diagnoses include septic arthritis (infection) and fractures \u2014 CORRECT. (4) Treatment of choice is conservative \u2014 physiotherapy, intra-articular steroids, NSAIDs, and manipulation under anaesthesia. Surgery (arthroscopic capsular release) is reserved for refractory cases only \u2014 statement 4 is WRONG.'\n },\n {\n id:19,\n stem:'The prognosis in reduced or unreduced fractures involving the epiphyseal plate is very poor if the fracture line:',\n correct:'Crushes the epiphyseal plate',\n options:['Runs along the epiphyseal plate','Extends into epiphysis','Crushes the epiphyseal plate','Crosses the epiphyseal plate'],\n exp:'Salter-Harris classification of physeal (growth plate) fractures: Type I (along plate), Type II (through metaphysis + plate), Type III (into epiphysis), Type IV (crosses both), Type V (crush\/compression). Type V (Salter-Harris V) \u2014 direct axial compression crushing the growth plate \u2014 has the worst prognosis because it directly destroys the germinal layer of chondrocytes. This leads to premature physeal closure, leg length discrepancy, and angular deformity. It is often missed on X-ray at initial presentation.'\n },\n {\n id:20,\n stem:'A 30-year-old man presents with multiple rib fractures and paradoxical movement with severe respiratory distress. X-ray shows pulmonary contusion on the right side without pneumothorax or haemothorax. Which one of the following is the initial choice of treatment?',\n correct:'Endotracheal intubation and mechanical ventilation',\n options:['Immediate internal fixation','Endotracheal intubation and mechanical ventilation','Thoracic epidural analgesia and O\u2082 therapy','Stabilisation with towel clips'],\n exp:'Flail chest (paradoxical movement from \u22653 consecutive ribs fractured in \u22652 places) with pulmonary contusion and severe respiratory distress requires immediate airway control and IPPV (intermittent positive pressure ventilation) via endotracheal intubation. Positive pressure ventilation acts as internal pneumatic splinting of the flail segment and supports the contused lung. Thoracic epidural + O\u2082 is appropriate for MILD flail chest without severe distress. Internal fixation is elective. Towel clip stabilisation is an outdated method. Severe distress mandates immediate intubation and ventilation.'\n },\n {\n id:21,\n stem:'Which of the following is NOT a clinical feature of tetanus?',\n correct:'Loss of consciousness',\n options:['Risus sardonicus','Opisthotonus','Loss of consciousness','Respiratory failure'],\n exp:'Tetanus (Clostridium tetani toxin \u2014 tetanospasmin) causes spastic paralysis by blocking inhibitory interneurons (glycine\/GABA). Features: trismus (lockjaw), risus sardonicus (sardonic grin from facial spasm), opisthotonus (extreme back arching), generalised tonic-clonic spasms, and respiratory failure (from laryngospasm or respiratory muscle spasm). Crucially, tetanus does NOT cause loss of consciousness \u2014 the patient remains FULLY CONSCIOUS and aware throughout the painful spasms. This distinguishes it from meningitis and encephalitis.'\n },\n {\n id:22,\n stem:'Hyperchloraemic acidosis is a common complication of:',\n correct:'Ureterosigmoidostomy',\n options:['Ureterosigmoidostomy','Diarrhoea','Vomiting','Ileostomy'],\n exp:'Ureterosigmoidostomy (diversion of ureters into sigmoid colon) causes hyperchloraemic metabolic acidosis (normal anion gap). The colonic mucosa reabsorbs urinary chloride in exchange for bicarbonate secretion, and ammonia is reabsorbed, while bicarbonate is lost \u2014 resulting in hyperchloraemic, hypokalaemic acidosis (also hyponatraemia). This is the most dangerous metabolic complication of ureterosigmoidostomy, along with adenocarcinoma at the ureterocolic junction. Diarrhoea causes hyperchloraemic acidosis too, but vomiting causes metabolic alkalosis and ileostomy causes bicarbonate loss (acidosis but with normal\/low Cl).'\n },\n {\n id:23,\n stem:'Endoluminal probe for transrectal ultrasonography operates at the frequency of:',\n correct:'7.5 MHz',\n options:['2.5 MHz','5.0 MHz','7.5 MHz','15.0 MHz'],\n exp:'Transrectal ultrasound (TRUS) uses an endoluminal probe inserted into the rectum to image the prostate, rectal wall, and perirectal structures. The endoluminal probe operates at 7.5 MHz (range 5\u201310 MHz), providing high-resolution near-field imaging at the cost of limited depth penetration. This frequency gives excellent detail of the prostate layers, seminal vesicles, and neurovascular bundles. Lower frequencies (2.5\u20133.5 MHz) are for abdominal scanning (deeper structures). Higher frequencies (>10 MHz) are used for superficial structures like skin and vessels.'\n },\n {\n id:24,\n stem:'A Seldinger needle is used for:',\n correct:'Arteriography',\n options:['Liver biopsy','Breast biopsy','Lymphangiography','Arteriography'],\n exp:'The Seldinger technique (Sven-Ivar Seldinger, 1953) is the standard method for percutaneous vascular access: a needle punctures the vessel, a guidewire is threaded through the needle, the needle is withdrawn, and a catheter is passed over the guidewire into the vessel. The Seldinger needle is specifically used for arteriography (and venography\/central venous access). This technique revolutionised interventional radiology and is the basis of all percutaneous catheter-based procedures. Liver and breast biopsies use cutting needles; lymphangiography uses cut-down on lymphatics.'\n },\n {\n id:25,\n stem:'The ideal temperature to store whole blood in a blood bank is:',\n correct:'4\u00b0C',\n options:['-4\u00b0C','0\u00b0C','4\u00b0C','8\u00b0C'],\n exp:'Whole blood and packed red blood cells are stored at 2\u20136\u00b0C (optimally 4\u00b0C) in a monitored blood bank refrigerator. This temperature retards bacterial growth, slows RBC metabolic activity (2,3-DPG depletion, ATP decline), and prevents haemolysis. Shelf life is 21\u201335 days depending on the anticoagulant-preservative used (CPDA-1 = 35 days). Temperatures below 0\u00b0C would freeze and destroy RBCs. Above 6\u00b0C accelerates bacterial proliferation and haemolysis. Platelets are stored at 20\u201324\u00b0C (room temperature) with agitation.'\n },\n {\n id:26,\n stem:'Bisgaard treatment refers to that of:',\n correct:'Venous ulcer',\n options:['Ruptured tendo Achillis','Venous ulcer','An ischaemic ulcer','An in-growing toe nail'],\n exp:'Bisgaard\\'s method (Bisgaard regime) is a conservative treatment protocol for chronic venous ulcers, comprising: elevation of the limb, compression bandaging (graduated multi-layer bandaging), and exercises to promote the calf muscle pump. It was one of the early systematic approaches to managing varicose ulcers. It is specifically associated with venous (gravitational\/stasis) ulcers, which are the most common type of leg ulcer. Ischaemic ulcers require vascular reconstruction; compression is contraindicated in ischaemia.'\n },\n {\n id:27,\n stem:'Glasgow Coma Scale (GCS) score ranges between:',\n correct:'3 and 15',\n options:['0 and 15','1 and 15','2 and 15','3 and 15'],\n exp:'The Glasgow Coma Scale assesses three components: Eye opening (E: 1\u20134), Verbal response (V: 1\u20135), Motor response (M: 1\u20136). The minimum score is 1+1+1 = 3 (no eye opening, no verbal response, no motor response \u2014 deeply comatose or dead). The maximum score is 4+5+6 = 15 (fully conscious, orientated, obeying commands). A score of 0 is not possible on the GCS scale. GCS \u22648 indicates severe head injury and mandates airway protection. The range is therefore 3\u201315.'\n },\n {\n id:28,\n stem:'The most common cause of intestinal obstruction is:',\n correct:'Bands and adhesions',\n options:['Obstructed hernia','Inflammatory abdominal conditions','Gastrointestinal malignancy','Bands and adhesions'],\n exp:'Bands and adhesions (postoperative fibrous adhesions) are by far the most common cause of small bowel obstruction in adults in the developed world, accounting for ~60\u201370% of cases. They form after peritoneal surgery, inflammation, or infection. In countries with a high rate of abdominal surgery, adhesional obstruction predominates. Obstructed hernia is the most common cause in countries with limited surgical access. Malignancy is a common cause of large bowel obstruction. In children, intussusception and Meckel\\'s diverticulum are important causes.'\n },\n {\n id:29,\n stem:'The most common site for nosocomial (hospital-acquired) infection is:',\n correct:'Urinary tract',\n options:['Respiratory tract','Urinary tract','Surgical site','Blood stream'],\n exp:'Urinary tract infections (UTIs) are the most common nosocomial (healthcare-associated) infections, accounting for approximately 35\u201340% of all hospital-acquired infections. The vast majority are associated with urinary catheterisation (catheter-associated UTI, CAUTI). Catheterised patients develop bacteriuria at ~5% per day; virtually all catheterised patients have bacteriuria by 30 days. Common organisms: E. coli, Klebsiella, Pseudomonas, Enterococcus, Candida. Pneumonia (VAP) is second; surgical site infections third.'\n },\n {\n id:30,\n stem:'A patient has a carcinoid tumour of the appendix measuring more than 2.5 cm. The management of choice is:',\n correct:'Right hemicolectomy',\n options:['Appendicectomy','Appendicectomy and 24-hour urinary HIAA','Appendicectomy and abdominal CT scan','Right hemicolectomy'],\n exp:'Appendicular carcinoid management depends on tumour size: <1 cm (majority) \u2192 simple appendicectomy is curative (metastatic risk <2%). 1\u20132 cm \u2192 appendicectomy; right hemicolectomy if at base or with mesoappendix involvement. >2 cm (\u22652.5 cm) \u2192 RIGHT HEMICOLECTOMY is mandatory due to significantly increased risk of lymph node metastasis (up to 30%) and distant spread. Tumours >2.5 cm behave more aggressively and require formal oncological resection with lymph node clearance, just like a right-sided colon cancer.'\n },\n {\n id:31,\n stem:'What is the most common cause of intestinal obstruction in neonates?',\n correct:'Duodenal atresia',\n options:['Meconium ileus','Duodenal atresia','Volvulus neonatorum','Hirschsprung\\'s disease'],\n exp:'Duodenal atresia is the most common cause of neonatal intestinal obstruction, occurring in approximately 1 in 5,000\u201310,000 live births. It results from failure of recanalisation of the duodenal lumen during embryogenesis. Presents within hours of birth with bilious vomiting. X-ray shows the pathognomonic \"double bubble\" sign (distended stomach and proximal duodenum). Often associated with Down syndrome (30% of cases) and other anomalies. Meconium ileus is specific to cystic fibrosis. Hirschsprung\\'s is the most common cause of neonatal large bowel obstruction.'\n },\n {\n id:32,\n stem:'Match List I (Drug) with List II (Complication):\\nA. Cisplatin\\nB. Adriamycin\\nC. Bleomycin\\nD. Cyclophosphamide\\n\\n1. Haemorrhagic cystitis\\n2. Pulmonary fibrosis\\n3. Cardiomyopathy\\n4. Tubular necrosis',\n correct:'A-4, B-3, C-2, D-1',\n options:['A-3, B-4, C-2, D-1','A-4, B-3, C-1, D-2','A-3, B-4, C-1, D-2','A-4, B-3, C-2, D-1'],\n exp:'Cisplatin = nephrotoxicity (renal tubular necrosis) \u2014 requires aggressive hydration (A=4). Adriamycin (doxorubicin) = dose-dependent cardiomyopathy\/dilated CM \u2014 maximum lifetime dose 550 mg\/m\u00b2 (B=3). Bleomycin = pulmonary fibrosis (interstitial pneumonitis) + cutaneous toxicity \u2014 lung is the dose-limiting organ (C=2). Cyclophosphamide = haemorrhagic cystitis from acrolein metabolite \u2014 prevented with MESNA (D=1). These four drug-toxicity pairings are classic pharmacology examination facts.'\n },\n {\n id:33,\n stem:'Consider the following statements about Haemophilia A and Haemophilia B (Christmas disease):\\n1. Are variants of the same disease process.\\n2. Are due to congenital deficiency of factor VIII and factor IX respectively.\\n3. Both are sex-linked characteristics transmitted by asymptomatic females.\\n4. Can occur both in males and females.\\n\\nSelect the correct answer:',\n correct:'2 and 3',\n options:['2 and 3','1, 2 and 4','2 only','3 only'],\n exp:'Statement 1 is WRONG: Haemophilia A (factor VIII deficiency) and B (factor IX deficiency) are DIFFERENT diseases caused by mutations in different genes on the X chromosome \u2014 not variants of one process. Statement 2 is CORRECT: Haem A = factor VIII deficiency; Haem B = factor IX deficiency. Statement 3 is CORRECT: Both are X-linked recessive \u2014 carried on the X chromosome, transmitted by carrier females who are clinically normal (asymptomatic). Statement 4: Females can be affected only if homozygous (very rare \u2014 e.g., daughter of affected father and carrier mother), so \"can occur in females\" is technically true but 4 is typically listed as incorrect in this context since the question pairs it with statement 1. The best answer is 2 and 3.'\n },\n {\n id:34,\n stem:'A 30-year-old lady sustained a chest injury and presented with massive haemothorax on the right side. Tube thoracostomy drained 1800 ml of blood. What is the most appropriate treatment?',\n correct:'Resuscitation and prepare for urgent thoracotomy',\n options:['Correction of hypovolaemic shock','Put one more chest tube','Clamp the chest tube to cause tamponade','Resuscitation and prepare for urgent thoracotomy'],\n exp:'Indications for urgent thoracotomy in haemothorax: initial drainage >1500 ml (massive haemothorax on initial tube insertion) OR ongoing loss >200 ml\/hour for 2\u20134 hours OR haemodynamic instability despite resuscitation. This patient drained 1800 ml \u2014 exceeding the 1500 ml threshold for urgent thoracotomy. The management is simultaneous resuscitation (blood transfusion, IV fluids) while preparing for emergency thoracotomy to identify and control the bleeding source (often intercostal or internal mammary vessel, or lung laceration). Clamping the tube is dangerous (promotes clotted haemothorax and tamponade).'\n },\n {\n id:35,\n stem:'In a case of obstructed hernia, strangulation is suggested by which of the following?\\n1. Presence of shock\\n2. Pain is never completely absent\\n3. Localised tenderness associated with rebound tenderness\\n4. Pain persists despite conservative management\\n5. An external hernia becomes tense, tender, irreducible with recent increase in size\\n\\nSelect the correct answer:',\n correct:'1, 2, 3, 4 and 5',\n options:['1, 2, 3 and 4 only','1, 2, 4 and 5 only','1, 3 and 5 only','1, 2, 3, 4 and 5'],\n exp:'All five features suggest strangulation in an obstructed hernia: (1) Shock = ischaemia\/necrosis \u2192 septicaemia\/endotoxaemia. (2) In simple obstruction, colic is intermittent; in strangulation, pain is constant and never fully absent due to ischaemic infarction. (3) Localised tenderness with rebound = peritoneal irritation from ischaemia\/perforation. (4) Pain persisting despite conservative management suggests irreversible ischaemia. (5) A tense, tender, irreducible hernia with recent increase in size is the classic clinical picture of strangulation. All five correctly identify strangulation.'\n },\n {\n id:36,\n stem:'Regarding haemorrhagic shock, which one of the following statements is correct?',\n correct:'Loss of 40% of circulating volume is life threatening',\n options:['Clinically manifested when >10% of total blood volume is lost','Tachycardia presents in 100% of hypovolaemic patients','Loss of 40% of circulating volume is life threatening','In acute stage of shock, systemic vasodilation becomes evident'],\n exp:'ATLS classification of haemorrhagic shock: Class I (<15% volume lost) \u2014 minimal signs, no tachycardia necessarily. Class II (15\u201330%) \u2014 tachycardia, anxiety. Class III (30\u201340%) \u2014 marked tachycardia, hypotension, confusion. Class IV (>40%) \u2014 immediately life-threatening, severe hypotension, altered consciousness, imminent death. Option C is correct: loss of \u226540% is life-threatening. Option A is wrong (Class I loss of 10% may be asymptomatic). Option B is wrong (tachycardia is absent in Class I). Option D is wrong (shock causes vasoCONSTRICTION, not vasodilation).'\n },\n {\n id:37,\n stem:'Poor prognostic indicators in advanced germ cell tumours show:\\n1. Primary sites in mediastinum\\n2. Non-pulmonary metastasis\\n3. Lactate dehydrogenase more than 10 times the normal value\\n\\nWhich of the statements given above are correct?',\n correct:'1, 2 and 3',\n options:['1, 2 and 3','2 and 3 only','1 and 3 only','1 and 2 only'],\n exp:'The IGCCCG (International Germ Cell Cancer Collaborative Group) classification defines poor prognosis germ cell tumours by: (1) Non-gonadal primary site (mediastinal primary, retroperitoneal) \u2014 correct. (2) Non-pulmonary visceral metastases (liver, bone, brain) \u2014 correct; pulmonary-only metastases are better prognosis. (3) Very high tumour markers \u2014 AFP >10,000 IU\/mL, HCG >50,000 IU\/mL, or LDH >10\u00d7 upper limit of normal \u2014 correct. All three are valid poor prognostic criteria in the IGCCCG classification.'\n },\n {\n id:38,\n stem:'Which one of the following structures is NOT removed during a classical radical neck dissection?',\n correct:'Trapezius',\n options:['Trapezius','Sternocleidomastoid','Internal jugular vein','Accessory nerve'],\n exp:'Classical radical neck dissection (Crile\\'s operation) removes: all five lymph node levels, sternocleidomastoid muscle, internal jugular vein, and spinal accessory nerve (CN XI). The TRAPEZIUS muscle is NOT removed in radical neck dissection \u2014 it is the muscle that is DENERVATED when the accessory nerve is sacrificed (causing shoulder drop), but the trapezius itself remains. Modified radical neck dissection preserves one or more of the non-lymphatic structures (SCM, IJV, CN XI) to reduce morbidity while achieving equivalent oncological control.'\n },\n {\n id:39,\n stem:'Mousseau-Barbin tube is used for:',\n correct:'Advanced cancer oesophagus',\n options:['Advanced cancer stomach','Advanced cancer oesophagus','Advanced cancer oropharynx','All of these'],\n exp:'The Mousseau-Barbin tube (M-B tube) is a plastic pulsion prosthesis (intubation tube) that is passed through a malignant oesophageal stricture in inoperable\/advanced oesophageal carcinoma to maintain luminal patency and allow swallowing (especially liquids). It is a palliative intervention, providing relief of dysphagia in patients who are not surgical candidates. Modern self-expanding metallic stents (SEMS) have largely replaced M-B tubes, but the concept and instrument remain examination topics. It is specific to oesophageal cancer, not gastric or oropharyngeal.'\n },\n {\n id:40,\n stem:'Which one of the following is the investigation of choice in a patient with haematemesis?',\n correct:'Flexible upper gastrointestinal endoscopy',\n options:['Flexible upper gastrointestinal endoscopy','Barium meal for stomach and duodenum','Contrast-enhanced CT scan','Selective left gastric angiography'],\n exp:'Upper GI endoscopy (oesophagogastroduodenoscopy, OGD) is the gold standard investigation for haematemesis. It is both diagnostic (identifies the bleeding source in >90% of cases \u2014 peptic ulcer, varices, Mallory-Weiss tear, oesophagitis) and therapeutic (injection, heat probe, banding, clipping). It should be performed within 24 hours (or urgently if haemodynamically unstable). Barium meal is contraindicated in acute bleeding. CT angiography is used when endoscopy is negative or unavailable. 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