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': 'Hormonal therapy is useful if Cancer breast expresses ... \nSelect and explain. \nA. Estrogen receptor, B. Progesterone receptor, C. Selling Her 2 neu, D. VEGF', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Estrogen receptor(Ref. Sabiston 20th edition Page 853)* ER positive cases are provided Hormone therapy* HER-2/neu Positive cases are provided Trastuzumab HERCEPTIN (VEGF inhibitor)', 'role': 'assistant'}]