This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oncology, Subject name: Medicine
Specific Tumor marker is seen in - 
Select and explain. 
A. Ca breast, B. Ca lung, C. Ca liver, D. Ca ovary
A: Ca breast
Answer: A: Ca breast 
Explanation: <img src=" /> Ref Harrison 20th edition pg 528