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': "Mirizzi's Syndrome is \nSelect and explain. \nA. GB stone compressing common hepatic duct, B. GB carcinoma invading IVC., C. GB stone causing cholecystitis, D. Pancreatic carcinoma", 'role': 'user'}, {'content': "Answer: A \nExplanation: Mirriz's syndrome(Functional hepatic syndrome) It is defined as obstruction of the common hepatic duct or CBD by external compression or by erosion of stone in the Hamann pouch or cystic duct. External compression has been classified as type I where as erosion as type II Mirriz's syndrome by McSherry Ref: Sabiston 20th edition Pgno :1510", 'role': 'assistant'}]