<prompt> Following is not true about the gene mutations leading to breast carcinoma -Most common mutation in inherited breast carcinoma is BRCA1BRCA 1 mutation is present in most of the cases of breast carcinomaInherited breast carcinomas make about 3 of the total casesp53 mutation also increases chances of colon and brain cancer  <response>: Answer- B. BRCA 1 mutation is present in most of the cases of breast carcinomaGenetic mutations associated with breast cancer are of two types -i Germline mutations inherited mutationsInvolved in familial cases of breast cancer.ii Somatic mutations acquired mutationInvolved in sporadic cases of breast cancer 