This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'Consider the following \nSelect and explain. \nA. Cholesterosis, B. Adenomyomatosis, C. Polyposis, D. Cholelithiasis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]