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: Surgery
[{'content': 'T3 in the TNM staging of the oral malignant lesions represents \nSelect and explain. \nA. Carcinoma in situ, B. Tumour 2 cm or less in greatest diameter, C. Tumour > 2 cm but < 4 cm in greater diameter, D. Tumour > 4 cm in greatest diameter', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]