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': 'The drug which reduces the size of myoma include \nSelect and explain. \nA. Danazol, B. Progesterone, C. GnRH agonist, D. Mifepristone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]