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: Physiology
Copper binding protein ? 
Select and explain. 
A. Albumin, B. Globulin, C. Transferrin, D. Ceruloplasmin
D: Ceruloplasmin
Answer: D: Ceruloplasmin 
Explanation: Ans. is 'd' i.e., Ceruloplasmin