<prompt> Risk factor for CA breastOCPBRCA-1 mutationNulliparityall of the above  <response>: .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 