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
Which of the following is a tumor markers for Hepatocellular carcinoma? 
Select and explain. 
A. AFP, B. CEA, C. HCG, D. CA-125
A: AFP
Answer: A: AFP 
Explanation: AFP is the most impoant tumor marker for HCC. AFP level is elevated in approximately 70% of individuals in Asian countries bearing HCC and 50% of patients in US and Europe. Ref: Sabiston 18/e, Page 582; CSDT 13/e, Page 519.