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
Peak value of Karyopyknotic index is reached on 
Select and explain. 
A. Proliferative phase, B. Day of ovulation, C. Secretory phase, D. Menopause
B: Day of ovulation
Answer: B: Day of ovulation 
Explanation: Normally, peak value of KPI is reached on the day of ovulation.