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 aid in the killing of intracellular bacteria? \nSelect and explain. \nA. Histamine, B. Interleukin-2, C. Catalase, D. Lysozyme', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Bacteria that are phagocytosed by macrophages are kept in membrane-bound vacuoles called phagosomes. A phagosome will fuse with a lysosome, which contains many degradative enzymes, including lysozyme.', 'role': 'assistant'}]