This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'In which of the following transition meiosis occurs : \nSelect and explain. \nA. Primary to secondary spermatocyte, B. Second spermatocyte to globular spermatid, C. Germ cells to spermatogonium, D. Spermatogonium to primary spermatocyte', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Transition meiosis Transition from mitosis to meiosis The spermatogonia undergo mitosis to form the primary spermatocytes, which then enter first meiotic division. They rest for 22 days and then rapidly complete the first meiotic division to form secondary spermatocytes. During second meiotic division secondary spermatocyte divides into spermatids. Reference : Langman\'"s Embryology, 13th edition page 29', 'role': 'assistant'}]