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 for carcinoma of tongue is: \nSelect and explain. \nA. Lateral margin, B. Tip of tongue, C. Posterior 1/3, D. Ventral surface', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]