This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Neoplastic Agents, Subject name: Pharmacology
[{'content': 'Anastrazole belongs to which class of drug - \nSelect and explain. \nA. Estrogen receptor down regulators (SERDs), B. Selective estrogen receptor modulators (SERMs), C. Selective tissue estrogenic activity regulator (STEAR), D. Aromatase inhibitors', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Aromatase inhibitors Drugs commonly used in hormone (estrogen) receptor positive breast cancero SERMs:- Tamoxifen, tromifeneo SERDs:- Fulvestranto Aromatase inhibitors:- Letrozole, anastrazole, exemestone.", 'role': 'assistant'}]