This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infertility, Subject name: Gynaecology & Obstetrics
Which of the following is true about obstructi azoospermia: 
Select and explain. 
A. FSH and LH increased, B. Normal FSH and normal LH, C. LH raised/ Normal FSH, D. FSH raised, Normal LH
B: Normal FSH and normal LH
Answer: B: Normal FSH and normal LH 
Explanation: Shaw's textbook of Gynaecology- 16th edn- pg no 244. Normal FSH and LH level indicates obstructive lesion in the vas or epididymis. High FSH indicates gonadal failure. Low FSH Indicates pituitary or hypothalamic failure.