This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy: General Principles, Subject name: Pharmacology
[{'content': 'All the following are hormonal agents used against breast cancer except: \nSelect and explain. \nA. Letrozole, B. Exemestane, C. Taxol, D. Tamoxifen', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (C) Taxol(Ref: Katzung 10th/897, 903, 904; KDT 8th/e p337-340)Letrozole, anastrozole and exemestane are aromatase inhibitors useful for the treatment of tamoxifen resistant breast carcinoma.Taxomifen is a SERM. It is also used for breast cancer.Taxol is commonly used term for paclitaxel. It is a cytotoxic drug (not hormonal).', 'role': 'assistant'}]