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': 'The most common site for squamous cell carcinoma in oral cavity is - \nSelect and explain. \nA. Tongue, B. Floor of mouth, C. Upper and lower alveolus, D. Buccal mucosa', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "The tongue is the most common site in the oral cavity, followed by the floor of mouth, lip, gingival and retromolar\xa0trigone".\n─ Radioguided surgery.', 'role': 'assistant'}]