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: Pathology
A testicular tumor marker is - 
Select and explain. 
A. a-Fetoprotein, B. Ectopic hormones, C. CEA, D. Testosterone
A: a-Fetoprotein
Answer: A: a-Fetoprotein 
Explanation: Ans. is 'a' i.e., a-Fetoproteins