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': 'Bile duct strictures are seen in all except \nSelect and explain. \nA. CBD stone, B. Cholangiocarcinoma, C. Trauma, D. Acute pancreatitis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Causes of biliary strictures Benign Congenital Biliary atresia Operative injury Cholecystectomy Choledochotomy Gastrectomy Hepatic resection Transplantation Inflammatory Stones Cholangitis Parasitic Sclerosing cholangitis Radiotherapy Trauma Idiopathic Malignant Cholangiocarcinoma CA head of pancreas Ampullary carcinoma Metastasis to liver or biliary tract Ref: Sabiston 20th edition Pgno :1509-1510', 'role': 'assistant'}]