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
An increased incidence of cholangiocarcinoma is seen in all of the following except - 
Select and explain. 
A. Hydatid cyst of liver, B. Polycystic disease of liver, C. Sclerosing cholangitis, D. Liver flukes
A: Hydatid cyst of liver
Answer: A: Hydatid cyst of liver 
Explanation: Ans. is 'a' i.e., Hyadatid cyst of liver Polycystic disease of liver is a predisposing factor for cholangiocarcinoma