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
Weils' disease is caused by ? 
Select and explain. 
A. Leptospira, B. Listeria, C. Mycoplasma, D. Legionella
A: Leptospira
Answer: A: Leptospira 
Explanation: Ans. is 'a' i.e., Leptospira