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: Gynaecology & Obstetrics
PESA / MESA is helpful in : 
Select and explain. 
A. Pre testicular azoospermia, B. Testicular azoospermia, C. Post testicular azoospermia, D. Asthenospermia
C: Post testicular azoospermia
Answer: C: Post testicular azoospermia 
Explanation: Post testicular azoospermia