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 not a tumor marker for hepatocellular carcinoma \nSelect and explain. \nA. AFP, B. PIVKA II, C. CEA, D. Glycipin 3', 'role': 'user'}, {'content': 'Answer: C \nExplanation: CEA is raised in colon ca.', 'role': 'assistant'}]