This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: X-RAYS, Subject name: Radiology
Which of the following features suggesting malignant lesion on mammography? 
Select and explain. 
A. Round well defined borders, B. Macrocalcifications, C. Microcalcifications, D. Fat content
C: Microcalcifications
Answer: C: Microcalcifications 
Explanation: Microcalcifications are suggestive of a malignant lesion. Macrocalcification/ Popcorn calcifications are fibroadenomas which are benign lesions The pattern and shape of microcalcifications can also give radiologists clues about whether cancer may be present. Linear, rod-like calcifications raise suspicion of underlying breast cancer, whereas popcorn, eggshell, and rim-like calcifications are usually benign.