This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
On mammogram all of the following are the features of a malignant tumor except – 
Select and explain. 
A. Spiculation, B. Microcalcification, C. Macrocalcification, D. Irregular mass
C: Macrocalcification
Answer: C: Macrocalcification 
Explanation: None