This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
New vaginal ring used to prevent pregnancy for an entire year 
Select and explain. 
A. Segesterone acetate, B. Desogestrel, C. Norgestimate, D. Levonorgestrel
A: Segesterone acetate
Answer: A: Segesterone acetate 
Explanation: It is a ring shaped non biodegradable , flexible, white opaque system contain a estrogrn n progesterone ative compounds.