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: Pharmacology
[{'content': 'Which of the following is a selective progesterone receptor modulator- \nSelect and explain. \nA. Onapristone, B. Ulipristal, C. Nomegestrol, D. Toremifene', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Ulipristal o Ulipristal is a SPRM approved for use as an Emergency Contraceptive. o SPRM (selective progesterone receptor modulators) : Asoprisnil, ul ipristal, onapristone, mifepristone.", 'role': 'assistant'}]