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: Pathology
An enzyme that protects the brain from free radical injury is - 
Select and explain. 
A. Myeloperoxidase, B. MAO, C. Superoxide dismutase, D. Hydroxylase
C: Superoxide dismutase
Answer: C: Superoxide dismutase 
Explanation: None