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
[{'content': 'Which of the following is (uses) an oxygen dependent mechanism of killing/degradation in phagocytosis \nSelect and explain. \nA. H2O2- MPO halide, B. BPI (Bactericidal Permeability Increasing Protein), C. Lactoferrin, D. Lysozyme', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]