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': 'The main reservoir for entamoeba histolytica is \nSelect and explain. \nA. Man, B. Diy water, C. Soil, D. Ponds', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is `a' i.e., Man", 'role': 'assistant'}]