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': 'Patient with 1.2 cm breast lump with three lymph nodes in the axilla of same side,LN are fixed with no metastasis is in which stage as per AJCC? \nSelect and explain. \nA. T1N0M0, B. T1N1M0, C. T1N2aM0, D. T2N1M0', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]