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': 'Enzymes 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: Ref Robbins 7/e p17; Harrison 17/e p2572;9/e p48 Superoxide dismutase (SOD, EC 1.15.1.1) is an enzyme that alternately catalyzes the dismutation (or paitioning) of thesuperoxide (O2-) radical into either ordinary molecular oxygen (O2) or hydrogen peroxide (H2O2).', 'role': 'assistant'}]