This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallbladder Cancer, Subject name: Surgery
[{'content': 'CLonarchis sinensis causes - \nSelect and explain. \nA. Cholangiocarcinoma, B. CBD adenoma, C. Choledocal cyst, D. HCC', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Cholangiocarcinoma o Risk factors for Choangiocarcinoma#Primary sclerosing cholangitis#Choledochal cyst# Ulcerative colitisMnemonic 5 C's# Clonorchis sinensis inf# Chronic typhoid carrierso Other risk factorsHepatolithiasisBiliary enteric anastomosisLiver flukesDietary nitrosaminesExposure to thorotrast, dioxin", 'role': 'assistant'}]