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
With references to vasectomy, consider the following statements : Non-scalpel vasectomy and conventional vasectomy have complication rates of 0.4% and 3% respectively When sperms are absent from two consecutive samples of semen, the vasectomy is considered complete for contraception 
Select and explain. 
A. 1 Only, B. 2 only, C. Both 1 and 2, D. Neither 1 nor 2
B: 2 only
Answer: B: 2 only 
Explanation: 2 only