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: ENT
[{'content': 'Carcinoma tongue most frequently develops from - \nSelect and explain. \nA. Tip, B. Lateral border, C. Dorsal portion, D. All portions equally', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Common sites for oral cancer\n\nTongue carcinoma → Lateral border\nLip carcinoma → Vermilion of lower lip\nCheek carcinoma → Angle of mouth', 'role': 'assistant'}]