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': 'Which ca has the best prognosis - \nSelect and explain. \nA. Carcinoma Lip, B. Carcinoma Cheek, C. Carcinoma Tongue, D. Carcinoma palate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Carcinoma of the oral cavity\n\nA most common type of carcinoma of the oral cavity is squamous cell carcinoma\nIn the oral cavity, tongue (30%) is the most common site followed by the lip (17.4%) and the floor of mouth (16.4%)\nThe mortality from squamous carcinoma also varies by the site in the mouth, with the lowest mortality from lip cancer and the highest for cancer of the Tongue.', 'role': 'assistant'}]