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': 'Breast conservation surgery is indicated in one of the following conditions -a) T1 breast tumorb) Multicentric tumorc) Extensive in situ cancerd) T4b breast tumor \nSelect and explain. \nA. a, B. bc, C. ad, D. ac', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]