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
After vasectomy aspermia will become evident in: 
Select and explain. 
A. 2 to 3 weeks, B. 4 to 6 weeks, C. 8 to 10 weeks, D. 10 to 12 weeks
D: 10 to 12 weeks
Answer: D: 10 to 12 weeks 
Explanation: 10 to 12 weeks