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': 'Which of the following is false about lip carcinoma? \nSelect and explain. \nA. Smoking is a risk factor, B. More common in lower lip, C. Lowe lip Ca has worst prognosis among all oral cancers, D. Distant metastasis is late', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Lower lip cancer which is more common and has best prognosis among all oral cancers.', 'role': 'assistant'}]