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
Which of the following helps in generating oxygen burst in the neutrophils? 
Select and explain. 
A. Superoxide dismutase, B. Catalase, C. Glutathione peroxidase, D. NADPH oxidase
D: NADPH oxidase
Answer: D: NADPH oxidase 
Explanation: O2 Dependent Killing:- Most efficient bactericidal system in Neutrophils- H2O2- MPO-halide System.