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
Time taken for spermatogenesis is 
Select and explain. 
A. 50-60 days, B. 60-70 days, C. 80-90 days, D. 70-80 days
D: 70-80 days
Answer: D: 70-80 days 
Explanation: The process whereby the germ cells is converted into spermatids is called male gametogenesis or spermatogenesis. 
Shortly before puberty, the testicular cords become canalized and form the seminiferous tubules. 
Accompanying this change is the conversion of the germ cells into a group of spermatogonial cells. At regular intervals, spermatogonia arise from this stem cell cluster to start the process of spermatogenesis