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
All are true regarding LH surge except 
Select and explain. 
A. LH surge acts rapidly on both granulosa and theca cells of preovulatory follicle, B. LH surge initiates re - entry of oocyte into meiosis, C. Ovulation occurs 24 hours after LH surge, D. Mean duration of LH surge is 48 hours
C: Ovulation occurs 24 hours after LH surge
Answer: C: Ovulation occurs 24 hours after LH surge 
Explanation: Ovulation occurs 36 to 40 hours after the onset of LH surge.