This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology Pa 2 ( Hybridoma Technology, Complement Pathways, Interferon, Structure and Functions of Immune Cells ), Subject name: Microbiology
The function common to neutrophils, monocyte & macrophages is 
Select and explain. 
A. Immune response, B. Phagocytosis, C. Liberation of histamine, D. Destruction of old erythrocytes
B: Phagocytosis
Answer: B: Phagocytosis 
Explanation: Neutrophils, monocyte & macrophages are the pa of phagocytosis not the pa of immunty. Cellular Components and Phagocytosis Therefore, phagocytes, present in the blood, lymphoid tissue, liver, spleen, lung, and other tissues, are the cells responsible for the uptake and removal of foreign antigen. Phagocytes include (1) monocytes and macrophages; (2) granulocytes, including neutrophils, eosinophils, and basophils; and (3) dendritic cells. Histamine is released by mast cells . Destruction of old erythrocytes is by splenic tissue.