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: Pathology
[{'content': 'Commonest site of carcinoma of tongue \nSelect and explain. \nA. Posterior one third, B. Ventral surface, C. Tip of tongue, D. Lateral margin', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]