This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
[{'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: Superoxide dismutase ref Robbins 7/e p17 , Harrison 17/e p 2572 ,9/e p48.', 'role': 'assistant'}]