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': 'Commonest site of carcinoma tongue - \nSelect and explain. \nA. Apical, B. Lateral borders, C. Dorsum, D. Posterior 1/3', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Lateral borders Most common site is middle of the lateral border or the ventral aspect of the tongue.", 'role': 'assistant'}]