This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and Reproduction, Subject name: Physiology
Time for formation of mature sperm- 
Select and explain. 
A. 30-35 days, B. 40-45 days, C. 50-55 day, D. 70-75 days
D: 70-75 days
Answer: D: 70-75 days 
Explanation: Ans. is 'd' i.e., 70-75 days * In humans, it takes an average of 74 days to form a mature sperm from primitive germ cells.