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
[{'content': '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. \nBased on these clinical findings TNM stage of the tumour is: \nSelect and explain. \nA. T2 N2 Mo., B. T2N2Mo., C. T1N2Mo, D. T2N1Mo.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]