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: None