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
Simple hyperplasia of the endometrium is treated with progesterone for -- days : 
Select and explain. 
A. 14, B. 21, C. 5, D. 10
B: 21
Answer: B: 21 
Explanation: 21