This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Free Radical Injury, Subject name: Pathology
[{'content': 'Which of the following is a free radical scavenging enzyme? \nSelect and explain. \nA. Myeloperoxidase, B. Glutathione peroxidase, C. NADPH oxidase, D. Protease', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Elimination of free radical occur multiple mechanism:- 1.Antioxidant: (Glutathione and vitamin A, C, E) 2.Enzymes:- (i) Superoxide dismutase(mitochondria) O2-H2O (ii) Glutathione peroxidase (mitochondria) (iii) Catalase (Peroxisome): H2O2-O2 and H2O (glutathione independent). 3. Metal Carrier protein (Transferrin/Ceruloplasmin). Destruction of phagocytose material:- Oxygen dependent killing is most effective mechanism.', 'role': 'assistant'}]