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': 'Factors associated with gall bladder caa) Chronic cholesterol stoneb) Hyperlipidemiac) Chronic gall bladder diseased) Hepatitise) Porcelain gall bladder \nSelect and explain. \nA. acd, B. bde, C. cde, D. ace', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]