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': 'Treatment for common bile duct stone is by ? \nSelect and explain. \nA. ESWL, B. Exploration of bile duct and recovery of stones, C. Bile duct stenting, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer (a) ESWL, (b) Exploration of bile duct and recovery of stones, (c) Bile duct stenting', 'role': 'assistant'}]