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
[{'content': 'PESA / MESA is helpful in : \nSelect and explain. \nA. Pre testicular azoospermia, B. Testicular azoospermia, C. Post testicular azoospermia, D. Asthenospermia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Post testicular azoospermia', 'role': 'assistant'}]