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': 'True about timing of LH surge \nSelect and explain. \nA. Occur 12 hour before ovulation, B. Occur 12 hour after ovulation, C. Occur 24 hour before ovulation, D. Occur 24 hour after ovulation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: LH surge initiates luteinization acting through its receptors about 24-48 hours prior to ovulation', 'role': 'assistant'}]