This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'All of the following are seen with bile duct stone except: March 2008 \nSelect and explain. \nA. Obstructive jaundice, B. Distended and palpable gall bladder, C. Pruritis, D. Clay coloured stools', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Distended and palpable gall bladder Jaundice occurs when the CBD becomes obstructed and conjugated bilirubin enters the bloodstream. A history of clay-colored stools and tea-colored urine is obtained from such patients in approximately 50% of cases. The jaundice can be episodic. Palpable gallbladder (Courvoisier sign) may indicate gall bladder malignancy.', 'role': 'assistant'}]