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: Gynaecology & Obstetrics
[{'content': 'All are postcoital contraceptives except : \nSelect and explain. \nA. IUD, B. Danazol, C. High dose estrogen, D. Medroxy progesterone acetate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Medroxy progesterone acetate', 'role': 'assistant'}]