This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Surgery
[{'content': 'ER Positive cases of cancer breast - drug given is \nSelect and explain. \nA. Bevacizumab, B. Tamoxifen, C. Cyclophosphamide, D. Adalimumab', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Tamoxifen(Ref. Sabiston 20th edition 853)* Tamoxifen - ER+ ve Tumors in Premenopausal and Postmenopausal* Aromatose Inhibitors - ER +ve in Postmenopausal women only', 'role': 'assistant'}]