This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Gynae), Subject name: Gynaecology & Obstetrics
[{'content': 'LH surge occurs at \nSelect and explain. \nA. At the time of ovulation, B. 5-6 days before ovulation, C. 24-36 hours before ovulation, D. 24 - 72 hours after ovulation', 'role': 'user'}, {'content': "Answer: C \nExplanation: C. i.e. (24 - 36 hours before ovulation) (37-Shaw's 14th/64-Dutta 4th)* LH surge precedes ovulation by 24 to 36 hours (mean 30 hours) and minimum of 75 ng/ml is required for ovulation (37 - Shaw's 14th)* LH levels remains almost static throughout the cycle except at least 12 hours prior to vulation. When it attains its peak, called LH surge (64 - Dutta 4th)* The main function of LH is steroidogenic, but along with FSH. It is responsible for full maturation of the graffian follicle and oocyte and ovulation", 'role': 'assistant'}]