This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Testoesterone receptor antagonist is - \nSelect and explain. \nA. Flutamide, B. Mifipristone, C. Danazol, D. Nonoxynol', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ref - semantischolar.org', 'role': 'assistant'}]