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
[{'content': 'Commonest site for carcinoma of the breast- \nSelect and explain. \nA. Lower inner quadrant, B. Nipple, C. Upper inner quadrant, D. Upper outer quadrant', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]