This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
Tumor marker CA 15-3 is associated with ? 
Select and explain. 
A. Ovary, B. Breast, C. Prostate, D. Kidney
B: Breast
Answer: B: Breast 
Explanation: Harshmohan textbook of pathology 7th edition tumor marker CA 15-3 is associated with breast cancer. ovary - CA 125 prostate- PSA..