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
Infectious pa of chlamydia is - 
Select and explain. 
A. Elementary body, B. KP body, C. Reticulate body, D. None
A: Elementary body
Answer: A: Elementary body 
Explanation: Ans. is `a' i.e., Elementary body