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': 'Gallstones may be complicated by which among the following - \nSelect and explain. \nA. Pancreatitis, B. Choledocholithiasis, C. Acute cholecystitis, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer 'a' i.e. Pancreatitis; 'b' i.e. Choledocholithiasis; 'c' i.e. Acute cholecystitis", 'role': 'assistant'}]