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: Unknown
[{'content': 'In which of the following tumors alpha fetoprotein (AFP) is elevated? \nSelect and explain. \nA. Choriocarcinoma, B. Neuroblastoma, C. Hepatocellular carcinoma, D. Seminoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Serum elevations of alkaline phosphatase and alpha fetoprotein are common. An abnormal type of prothrombin, des-gamma-carboxy prothrombin, is made and correlates with AFP elevations.', 'role': 'assistant'}]