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
[{'content': 'Positive Acute phase reactants are all except : \nSelect and explain. \nA. Serum Amyloid A protein, B. Transthyretin, C. Fibrinogen, D. Hepcidin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]