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 secreted in choriocarcinoma is : 
Select and explain. 
A. CEA, B. Prolactin, C. HCG, D. Alfa feto protein
C: HCG
Answer: C: HCG 
Explanation: HCG