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
The drug which reduces the size of myoma include 
Select and explain. 
A. Danazol, B. Progesterone, C. GnRH agonist, D. Mifepristone
C: GnRH agonist
Answer: C: GnRH agonist 
Explanation: None