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
Physiological amenorrhea is presentin all except: 
Select and explain. 
A. Pregnancy, B. Lactation, C. Pre-pubey, D. Post-pubey
D: Post-pubey
Answer: D: Post-pubey 
Explanation: Post-pubey