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
In which of the following tumors alpha fetoprotein (AFP) is elevated? 
Select and explain. 
A. Choriocarcinoma, B. Neuroblastoma, C. Hepatocellular carcinoma, D. Seminoma
C: Hepatocellular carcinoma
Answer: C: Hepatocellular carcinoma 
Explanation: 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.