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
Most common cause of biliary stricture is 
Select and explain. 
A. CBD stone, B. Trauma, C. Asiatic cholangitis, D. Congenital
B: Trauma
Answer: B: Trauma 
Explanation: 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