This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Aboions, Spontaneous & Induced Emergency Contraception (Hey,whats the hurry !), Subject name: Gynaecology & Obstetrics
[{'content': 'Antiprogesterone compound RU-486 is effective for inducing aboion if the duration of pregnancy is: \nSelect and explain. \nA. 63 days, B. 72 days, C. 88 days, D. 120 days', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mifepristone (RU 486) an Antiprogestin, degenerates the pregnancy in doses ranging from 200-600mg. This is followed by Misoprostol (prostagladin) in 400ug orally or 800ug vaginally which causes uterine contractions to expel the dead fetus. This regime is -99% successful - If done within 1st 7 weeks -95% successful - If done within 1st 9 weeks', 'role': 'assistant'}]