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
Which of the following is the best specimen for semen analysis : 
Select and explain. 
A. A condom specimen, B. A specimen obtained by masturbation near the laborator, C. A specimen obtained by colitus interuptus into a wide-vessel, D. B + D
D: B + D
Answer: D: B + D 
Explanation: B + D