This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Breast, Subject name: Pathology
[{'content': 'Most sensitive and specific investigation for carcinoma breast is:(2001) \nSelect and explain. \nA. CT scan, B. Thermography, C. USG, D. Mammography', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans: dRef: Robbin's, 7th ed, p. 1072 & 6th ed, p. 1046", 'role': 'assistant'}]