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
The following are true related with regards to vasectomy except 
Select and explain. 
A. Leads to immediate sterility, B. Failure rate is 0.1%, C. Involves ligation and division of spermatic cord, D. Partner (wife may be given DMPA for 3 months
A: Leads to immediate sterility
Answer: A: Leads to immediate sterility 
Explanation: Vasectomy consists of dividing and excising a part of vas deferens (with spermatic cord).
It leads to permanently ending fertility fo men.
Failure rate 0.15%.
The sterility does not occur immediately after vasectomy. Sperms remain in semen for 15–20 ejaculations which is approximately 3–4 months, during which time an additional contraceptive method (condom by male or DMPA by wife should be used).