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: Pathology
[{'content': "False about Klinefelter's syndrome: AP 08; MAHE 12 \nSelect and explain. \nA. Most common syndrome of sex gene involvement, B. Most common cause of hypothalamic hypogonadotropic failure in males, C. Mental retardation may be seen, D. Serum FSH levels are consistently high", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Most common cause of hypothalamic hypogonadotropic failure in males', 'role': 'assistant'}]