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': 'Which is not true of Carcinoma tongue- \nSelect and explain. \nA. Lateral border is involved, B. Cervical lymph node involvement, C. Commonly adeno carcinoma, D. Tobacco chewing is a risk factor', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]