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: Surgery
[{'content': 'The most impoant prognostic factor for carcinoma breast is: \nSelect and explain. \nA. Stage, B. DNA content of tumor, C. Histologic subtype, D. Tumor grade', 'role': 'user'}, {'content': "Answer: A \nExplanation: Most impoant prognostic factor for carcinoma breast: StageQ >Axillary LN statusQ Most impoant prognostic factor for Wilm's tumor: HistologyQ >StageQ Most impoant prognostic factor for soft tissue sarcoma: Tumor gradeQ", 'role': 'assistant'}]