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': 'Which of the following is true about obstructive azoospermia: \nSelect and explain. \nA. FSH and LH increased, B. Normal FSH and normal LH, C. LH raised/ Normal FSH, D. FSH raised, Normal LH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Normal FSH and LH level indicate an obstructive lesion in the vas or epididymis. High FSH indicates gonadal failure. \nLow FSH Indicates pituitary or hypothalamic failure.', 'role': 'assistant'}]