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': 'Gum tumor with 2 contralateral mobile lymph nodes in cheek comes under -a) T3N2M0b) T2N2M0 c) T4N2M0d) T3N3M0 \nSelect and explain. \nA. ab, B. a, C. ad, D. bc', 'role': 'user'}, {'content': 'Answer: A \nExplanation: As the size of tumor is not mentioned so it may be any T.\nSince 2 contralateral mobile lymph nodes are present it will be N2 stage.\nNo local invasion given so it can be T1 or T2 or T3 but not T4.\n\nSo stage will be :\n- T3N2M0\n- T2N2M0', 'role': 'assistant'}]