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
Dark Ground microscopy detects: 
Select and explain. 
A. Leptospira, B. Borrelia, C. Treponema, D. Mycoplasma
C: Treponema
Answer: C: Treponema 
Explanation: Treponema