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': 'Mirrizi syndrome \nSelect and explain. \nA. Cyst present in CBD, B. Stone in cystic duct compressing CBD, C. Obstruction of pancreatic duct, D. Stone in Rt hepatic duct', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer- B. Stone in cystic duct compressing CBDIt comprises obstructive jaundice due to stone impacted in the neck of gall bladder, which compresses the common hepatic duct and eventually ulcerates into common hepatic duct causing cholecysto-choledochal fistula', 'role': 'assistant'}]