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
Marker for carcinoma colon is:September 2005, March 2013 
Select and explain. 
A. AFP, B. CA-125, C. CEA, D. HCG
C: CEA
Answer: C: CEA 
Explanation: Ans. C: CEA