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
The function common to neutrophils, monocytes, and macrophages is: 
Select and explain. 
A. Immune response is reduced, B. Phagocytosis, C. Liberation of histamine, D. Destruction of old erythrocytes
B: Phagocytosis
Answer: B: Phagocytosis 
Explanation: Phagocytic cells are: neutrophils monocytes macrophages