This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'All of the following enzymes may contribute to generating free oxygen radicals within neutrophil for killing bacteria except \nSelect and explain. \nA. Superoxide dismutase, B. Fenton reaction, C. NADPH oxidase, D. Glutathione peroxidase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Glutathione peroxidase is a free radical scavenger', 'role': 'assistant'}]