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: Surgery
Most common cause of surgically treatable male infeility is - 
Select and explain. 
A. Varicocele, B. Cryptorchidism, C. Stricture urethra, D. Epidydimitis
A: Varicocele
Answer: A: Varicocele 
Explanation: Ans. is 'a' i.e., Varicocele