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: Surgery
All are indicators of malignancy in a mammography except - 
Select and explain. 
A. Nodular cacification, B. Speckled margin, C. Attenuated architecture, D. Irregular mass
A: Nodular cacification
Answer: A: Nodular cacification 
Explanation: Answer (a) Nodular calcification