This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
The function common to neutrophilis, monocyte & macrophages is- 
Select and explain. 
A. Immune response, B. Phagocytosis, C. Liberation of histamine, D. Destruction of old crythrocytes
B: Phagocytosis
Answer: B: Phagocytosis 
Explanation: The professional phagocytes include many types of white blood cells (such as neutrophils, monocytes, macrophages, mast cells, and dendritic cells). Reff: Ananthanarayanan & Panikers textbook of microbiology 9th edition pg: 138