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': 'First evidence of primordial follicle can be seen in ovaries at : \nSelect and explain. \nA. 5th month of intrauterine life, B. 7th month of intrauterine life, C. At bih, D. At pubey', 'role': 'user'}, {'content': "Answer: A \nExplanation: At approximately 4 weeks, gonads form on the ventral surface of embryonic kidney at a site between 8th thoracic and 4th lumbar segments. Primordial follicle consists of a large cell, the primordial ovum(oogonia), which is surrounded by flattened cells,best termed as follicular epithelial cells. Reference: Shaw's Textbook of Gynaecology 15th edition, page 28", 'role': 'assistant'}]