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: Microbiology
[{'content': 'Schistosomiasis is transmitted by - \nSelect and explain. \nA. Cyclops, B. Fish, C. Snail, D. Cattle', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]