This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology and breast, Subject name: Surgery
[{'content': 'Risk factor for CA breast \nSelect and explain. \nA. OCP, B. BRCA-1 mutation, C. Nulliparity, D. all of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: .Risk factor for CA breast are Nulliparity BRCA-1 mutation oral contraceptive pills breast carcinoma in 1st degree relative obesity and alcohol intake early menarche and late menopause ref ;(page no;530) 5th edition of SRB&;S Manual of SURGERY', 'role': 'assistant'}]