This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': "Fulvestrant is used in the treatment of \nSelect and explain. \nA. HR positive metastatic breast cancer in post menopausal women, B. Male breast cancer, C. Paget's disease, D. Acute myeloid leukemia associated with Down's syndrome", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Fulvestrant is a selective estrogen receptor downregulator (SERD) used in cases of hormone receptor positive metastatic breast carcinoma in post menopausal women.', 'role': 'assistant'}]