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
All are used in treatment of endometriosis except: 
Select and explain. 
A. Medroxyprogesterone acetate, B. Tibolone, C. OCP, D. Danazol
B: Tibolone
Answer: B: Tibolone 
Explanation: None