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
[{'content': "Coarse 'Popcorn' calcification on mammogram is due to: \nSelect and explain. \nA. Fibroadenoma, B. Fat necrosis, C. Carcinoma in situ, D. Phylloides tumour", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Fibroadenoma', 'role': 'assistant'}]