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': '"Acute Meningoencephalitis" is caused by: \nSelect and explain. \nA. E. histolytica, B. Nageleria, C. Giardia, D. E.coli', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Nageleria', 'role': 'assistant'}]