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
SERM's are used as add-back therapy concurrently with GnRH agonist to 
Select and explain. 
A. Increase shrinkage of leiomyoma, B. Prevent bone loss, C. Avoid vasomotor symptoms, D. Decrease venous thromboembolism risks
B: Prevent bone loss
Answer: B: Prevent bone loss 
Explanation: SERMs  are used concurrently with GnRH agonist to prevent bone loss.