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: Physiology
Ovulation corresponds with: 
Select and explain. 
A. FSH surge, B. LH surge, C. Progesterone surge, D. Estradiol surge
B: LH surge
Answer: B: LH surge 
Explanation: B i.e. LH surgeA surge in LH secretion triggers ovulationQ, and ovulation normally occurs about 9 hours after the peak of LH surge at midcycle.