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': 'An increased incidence of cholangiocarcinoma is seen in all of the following except - \nSelect and explain. \nA. Hydatid cyst of liver, B. Polycystic disease of liver, C. Sclerosing cholangitis, D. Liver flukes', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Hyadatid cyst of liver Polycystic disease of liver is a predisposing factor for cholangiocarcinoma", 'role': 'assistant'}]