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': 'Time taken for spermatogenesis is \nSelect and explain. \nA. 50-60 days, B. 60-70 days, C. 80-90 days, D. 70-80 days', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The process whereby the germ cells is converted into spermatids is called male gametogenesis or spermatogenesis. \nShortly before puberty, the testicular cords become canalized and form the seminiferous tubules. \nAccompanying 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', 'role': 'assistant'}]