This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oxygen dependent bacterial killing, Subject name: Pathology
[{'content': 'The function common to neutrophils, monocytes, and macrophages is: \nSelect and explain. \nA. Immune response is reduced, B. Phagocytosis, C. Liberation of histamine, D. Destruction of old erythrocytes', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Phagocytic cells are: neutrophils monocytes macrophages', 'role': 'assistant'}]