This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Classification and metabolism of amino acids, Subject name: Biochemistry
Positive Acute phase reactants are all except : 
Select and explain. 
A. Serum Amyloid A protein, B. Transthyretin, C. Fibrinogen, D. Hepcidin
B: Transthyretin
Answer: B: Transthyretin 
Explanation: Acute phase reactants - Plasma proteins which are either increased or decreased during inflammation. Proteins which are increased are called as Positive Acute phase reactants and which are decreased are know as Negative Acute phase reactants.