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 is useful in: \nSelect and explain. \nA. Detection of early cancers, B. Lobular carcinoma of opposite breast, C. Large fatty breast, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. All of the above', 'role': 'assistant'}]