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
. Spirochetes among following are - 
Select and explain. 
A. Syphilis, B. Leptospira, C. Borrelia, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Syphilis; 'b' i.e., Leptospira; 'c' i.e., Borrelia