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
Which of the following proteins binds with free hemoglobin in the plasma - 
Select and explain. 
A. Albumin, B. Haptoglobin, C. Pre-albumin, D. Ceruloplasmin
B: Haptoglobin
Answer: B: Haptoglobin 
Explanation: None