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': 'Incidence of gall stone is high in: \nSelect and explain. \nA. Paial hepatectomy, B. Ileal resection, C. Jejunal resection, D. Subtotal gastrectomy', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Ileal resection) Ileal resection is associated with interruption of enterohepatic circulation of bile sults thereby decreasing the ratio of bile salts to cholesterol within the bile (Lithogenic bile)', 'role': 'assistant'}]