This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous System, Subject name: Pathology
[{'content': 'Enzyme that protects the brain from free radical injury is? \nSelect and explain. \nA. Myeloperoxidase, B. Superoxide dismutase, C. MAO, D. Hydroxylase', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (b) Superoxide dismutaseRef: Robbin's pathology 9th ed. I48, 80* Antioxidant enzymes include glutathione peroxidase, SOD and catalase.* Deficiency of SOF 1 gene may result in motor neuron disorder.", 'role': 'assistant'}]