This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Introduction and gametogenesis., Subject name: Anatomy
[{'content': 'First polar body is extruded at \nSelect and explain. \nA. Menstruation, B. Ovulation, C. Feilization, D. Menopause', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Oogenesis is formation of ovum i.e. female gamete. First polar body is released after LH surge (i.e. at or before ovulation) LH surge occurs 36 hrs before ovulation. LH peak occurs 12 hrs before ovulation. (first polar body released )', 'role': 'assistant'}]