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: Gynaecology & Obstetrics
Tumor marker for choriocarcinoma : 
Select and explain. 
A. HCG, B. AFP, C. CEA, D. Desmin
A: HCG
Answer: A: HCG 
Explanation: HCG