This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
Which of the following is a selective progesterone receptor modulator 
Select and explain. 
A. Tamoxifen, B. Ulipristal, C. Nomegestrol, D. Toremifene
B: Ulipristal
Answer: B: Ulipristal 
Explanation: SPRMS- Selective progesterone receptor modulators ulipristal, asoprisnil, proellex-new drugs Ulipristal used for emergency contraception Ref: KD Tripathi 8th ed