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': 'Post pill amenorrhoea is treated by : \nSelect and explain. \nA. Estrogens, B. Progesterone, C. Clonidine, D. Clomiphene', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Clomiphene', 'role': 'assistant'}]