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: Biochemistry
[{'content': 'Which of the following is not a chain-breaking antioxidant? \nSelect and explain. \nA. Superoxide Dismutase, B. Uric Acid, C. Catalase, D. Vitamin E', 'role': 'user'}, {'content': 'Answer: C \nExplanation: FREE RADICAL SCAVENGING SYSTEM\nAntioxidants fall into two classes:\n\nPreventive antioxidants, which reduced the rate of chain initiation.\n\t\nThey are Glutathione Peroxidase, Catalase.\n\n\nChain-breaking antioxidants, which interfere with chain propagation.\n\t\nThey are Superoxide Dismutase, Uric Acid, Vitamin E.\n\n\n\nReference- Review of biochemistry Rebecca James Perumcheril Pg-412', 'role': 'assistant'}]