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: Microbiology
[{'content': 'Acute phase reactants are all except ? \nSelect and explain. \nA. C-reactive protein, B. Haptaglobulin, C. Endothelin, D. Fibrinogen', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Endothelin", 'role': 'assistant'}]