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
Pontiac fever is caused by - 
Select and explain. 
A. Legionella, B. Listeria, C. Scrub typhus, D. Leptospira
A: Legionella
Answer: A: Legionella 
Explanation: None