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': 'Least common quadrant for breast carcinoma is \nSelect and explain. \nA. Upper outer, B. Upper inner, C. Lower outer, D. Lower inner', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most common quadrant for breast carcinoma upper outer quadrant.', 'role': 'assistant'}]