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
. Dysfunctional uterine bleeding is commonly met in all except: 
Select and explain. 
A. Adolescence, B. Following childbirth, C. Premenopausal period, D. Postmenopausal period
D: Postmenopausal period
Answer: D: Postmenopausal period 
Explanation: None