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: ENT
[{'content': "'T' staging of Glottic cancer with fixed vocal cords is \nSelect and explain. \nA. T1, B. T2, C. T3, D. T4", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]