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
Risk factor for CA breast 
Select and explain. 
A. OCP, B. BRCA-1 mutation, C. Nulliparity, D. all of the above
D: all of the above
Answer: D: all of the above 
Explanation: .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