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: Medicine
[{'content': 'The treatment of choice for silent stones in Gall bladder is : \nSelect and explain. \nA. Observation, B. Cholecystectomy, C. Cholecystectomy, D. Lithotripsy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer is A (Observation) Prophylactic cholecystectomy is not warranted in an asymptomatic patient.', 'role': 'assistant'}]