This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallstone Disease, Subject name: Surgery
[{'content': 'Not true of cholelithiasis - \nSelect and explain. \nA. Billiary fistula is a complication gall stone, B. More common in female, C. Clofibrate therapy is a predisposing factor, D. Ileal resection has no effect on gall stone formation', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Ilea refection has no effect on gall stone formation Pathogenesis of Cholesterol gall stoneso There are three elements necessary for the formation of cholesterol gall stonesLithogenic bileNucleation andStasis or gall bladder hypomotilityo Ideal disease/resection decreases or impairs enterohepatic circulation of bile salts leading to lithogenic bile.", 'role': 'assistant'}]