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': 'The treatment of choice for silent stones in Gall bladder is - \nSelect and explain. \nA. Observation, B. Chenodeoxy cholic acid, C. Cholecytectomy, D. Lithotripsy', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans is 'a' i.e., Observation", 'role': 'assistant'}]