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: Pathology
A patient with carcinoma  has a tumour of 2.5 cm located close to and involving the lower alveolus.  A single mobile homolateral node measuring 6 cm is palpable. 
Based on these clinical findings TNM stage of the tumour is: 
Select and explain. 
A. T2 N2 Mo., B. T2N2Mo., C. T1N2Mo, D. T2N1Mo.
A: T2 N2 Mo.
Answer: A: T2 N2 Mo. 
Explanation: None