Hallmark of breast malignancy on mammography :: (A) Low density lesion, (B) Smooth margin, (C) Clusters of micro calcification, (D) Popcorn calcification
Answer is C. Microcalcification's is pathognomonic sign for breast carcinoma. It may be seen in 30% cases of invasive carcinoma and 95% of cases of DCIS (granular and casting).