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': 'Primary amoebic meningitis caused by- \nSelect and explain. \nA. Naegleria fowleri, B. E.histolytica, C. E.coli, D. B.coli', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]