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 ideal treatment of stenosis of sphineter of Oddi is - \nSelect and explain. \nA. Transduodenal sphincteroplasty, B. Endoscopic sphincterotomy, C. Choledochojejunostomy, D. Choledochoduodenostmy', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e. Endoscopic sphincterotomy", 'role': 'assistant'}]