Activity of phagocytosis occurs through?

Correct option is C. Neutrophils and monocytes
The phagocytes include many types of white blood cells (such as neutrophils, monocytes, macrophages, mast cells, and dendritic cells).This binding will lead to the engulfing of the bacteria by the phagocyte.Neutrophils can secrete products that stimulate monocytes and macrophages.Neutrophil secretions increase phagocytosis and the formation of reactive oxygen compounds involved in the intracellular killing. Secretions from the primary granules of neutrophils stimulate the phagocytosis of IgG-antibody-coated bacteria.Hence, Activity of phagocytosis occurs through Neutrophils and monocytes.So, the correct answer is 'Neutrophils and monocytes'.