This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Pharmacology
Ullipristal acetate is 
Select and explain. 
A. GnRH agonist, B. Androgen antagonist, C. Selective estrogen receptor modulator, D. Selective progesterone receptor modulator
D: Selective progesterone receptor modulator
Answer: D: Selective progesterone receptor modulator 
Explanation: Refer Harrinson 19/e p 2391 Ullipristal is a selective progesterone receptor modulator like mifepristone It is used as an emergency contraceptive that can be used within 120 hours of unprotected intercourse