This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Anatomy
[{'content': 'Most common cause of biliary stricture is \nSelect and explain. \nA. CBD stone, B. Trauma, C. Asiatic cholangitis, D. Congenital', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Most common cause of benign biliary stricture is laparoscopic cholecytectomy I.e., operative trauma Incidence of bile duct injury during laparoscopic cholecystectomy is 0.3-0.85 % Ref:Sabiston 20th edition Pgno :1502', 'role': 'assistant'}]