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
Which of the following is (uses) an oxygen dependent mechanism of killing/degradation in phagocytosis 
Select and explain. 
A. H2O2- MPO halide, B. BPI (Bactericidal Permeability Increasing Protein), C. Lactoferrin, D. Lysozyme
A: H2O2- MPO halide
Answer: A: H2O2- MPO halide 
Explanation: None