This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Medical Abortion, Subject name: Gynaecology & Obstetrics
[{'content': 'All of the following drug have been used for medical abortion except: \nSelect and explain. \nA. Mifepristone, B. Misoprostal, C. Methotrexate, D. Atosiban', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' Atosiban Drugs used for abortionProstaglandinsPGE1 analogues are usedMisoprostolGemaristMifepristone (Ru-486)It is a progesterone antagonist. It is effective upto 9 weeksMethotrexateEffective upto 9 weeksAtosiban - is an oxytocin analogue and used as tocolytic.", 'role': 'assistant'}]