This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Basic Concepts and Vascular changes of Acute Inflammation, Subject name: Pathology
Negative acute phase reactant is: 
Select and explain. 
A. C-reactive protein, B. Alpha-1 antitrypsin, C. Transferrin, D. Serum amyloid protein
C: Transferrin
Answer: C: Transferrin 
Explanation: None