This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Pathology
CA-125 is a marker antigen for the diagnosis of 
Select and explain. 
A. Colon cancer, B. Breast cancer, C. Brain cancer, D. Ovarian cancer
D: Ovarian cancer
Answer: D: Ovarian cancer 
Explanation: (D) Ovarian Carcinoma MARKERSMucins & other GlycoproteinsAssociated Cancers* CA-125Ovarian cancer* CA-19-9Colon cancer, pancreatic cancer* CA-15-3Breast cancer