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': 'Mammography can be used in - \nSelect and explain. \nA. Early breast carcinoma, B. Mastitis, C. Fibroadenoma, D. Phyllodes tumor', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]