This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Tumor Markers, Subject name: Gynaecology & Obstetrics
Tumor markers of ovarian cancer is- 
Select and explain. 
A. CA125, B. CA19-9, C. AFP, D. hCG
A: CA125
Answer: A: CA125 
Explanation: Ans. is 'a' i.e., CA 125