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
Organism associated with fish consumption and also causes carcinoma gallbladder: 
Select and explain. 
A. Gnathostoma, B. Anglostrongyloidosis cantonensis, C. Clonorchis sinensis, D. H. dimunata
C: Clonorchis sinensis
Answer: C: Clonorchis sinensis 
Explanation: • Clonorchis sinensis is a liver fluke, acquired by ingestion of raw or inadequately cooked freshwater fishes.
• In human body, it lives within bile ducts and causes inflammatory reaction leading to cholangiohepatitis and biliary obstruction.
• It is a well known risk factor for cholangiocarcinoma.
• It is a rare, but mentioned risk factor for carcinoma gallbladder.