This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Not true for carcinoma tongue \nSelect and explain. \nA. Lateral border is involved, B. Adenocarcinoma is commonest, C. Cervical lymph node involvement, D. Tobacco chewing is a risk factor', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Squamous carcinoma of tongue is the commonest not adenocarcinoma', 'role': 'assistant'}]