This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gall Bladder & Bile Ducts, Subject name: Surgery
[{'content': 'Cholangiocarcinoma is associated with - \nSelect and explain. \nA. Chlonorchis sinensis, B. Schistosoma, C. Plasmodium, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Chlonorchis sinensisRef: Bailey 26th edition Table page 1115* Opisthorcis vivernii and Clonorchis sinensis are associated with Cholangiocarcinoma.', 'role': 'assistant'}]