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': '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 \nSelect and explain. \nA. 1 Only, B. 2 only, C. Both 1 and 2, D. Neither 1 nor 2', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 2 only', 'role': 'assistant'}]