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
Ca 125 is used for 
Select and explain. 
A. Follow up of ovarian cancer, B. Diagnosis of pancreatic cancer, C. Diagnosis of stomach cancer, D. Diagnosis of ovarian cancer
A: Follow up of ovarian cancer
Answer: A: Follow up of ovarian cancer 
Explanation: Harshmohan textbook of pathology 7th edition. ☆ CA 125 is a tumor marker of ovarian cancer. Most commonly used for follow up of ovarian cancer. ☆ pancreas tumor marker CA 19-9.