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
Which of the following is seen in dark field microscopy: September 2009 
Select and explain. 
A. Vibrio, B. Spirochaetes, C. Chlamydia, D. All of the above
B: Spirochaetes
Answer: B: Spirochaetes 
Explanation: Ans. B: Spirochaetes