This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallbladder, Subject name: Surgery
[{'content': 'The treatment of choice for silent gallbladder stones is:- \nSelect and explain. \nA. Observation, B. Chenodeoxycholic acid, C. Cholecystectomy, D. Lithotripsy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: There was no clear cost benefit and no life-years were gained from prophylactic cholecystectomy, indicating no clear-cut advantages of prophylactic cholecystectomy in asymptomatic cholelithiasis. As a result, in patients with asymptomatic gallstones, expectant management is recommended.', 'role': 'assistant'}]