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
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? 
Select and explain. 
A. T1N0M0, B. T1N1M0, C. T1N2aM0, D. T2N1M0
C: T1N2aM0
Answer: C: T1N2aM0 
Explanation: None