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
Primary amoebic meningitis caused by- 
Select and explain. 
A. Naegleria fowleri, B. E.histolytica, C. E.coli, D. B.coli
A: Naegleria fowleri
Answer: A: Naegleria fowleri 
Explanation: None