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': 'Organism associated with fish consumption which causes carcinoma gallbladder \nSelect and explain. \nA. Clonorchis sinensis, B. Gnathosoma, C. Stronglyoidosiscantonensis, D. H. diminuta', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Clonorchis sinensisRef: Bailey & Love 26th ed. /1115Clonorchis sinensis is liver fluke acquired by ingestion of raw or inadequately cooked fresh water fish. In human body it lives within bile ducts and causes inflammatory reaction leading to cholangitis, cholangio-hepatitis and biliary obstruction. It is well known to be a risk factor for Cholangio-carcinoma.', 'role': 'assistant'}]