This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Procedures - Cholecystectomy, Bile Duct Exploration, Store Extraction, Subject name: Surgery
[{'content': '3cm stone in cystic duct, method of removal - \nSelect and explain. \nA. Transduodenal approach, B. Supraduodenal approach, C. Lithotripsy, D. Chemical dissolution', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Supraduodenal approach", 'role': 'assistant'}]