The most active phagocytic white blood cells are

A

Eosinophils and lymphocytes

B

Neutrophils and monocytes

C

Neutrophils and eosinophils

D

Lymphocytes and macrophages

Phagocytosis is a process wherein special types of cells called as phagocytes ingest and kill invading organisms. Although eosinophils also act as phagocytes, most active phagocytes are neutrophils and monocytes. These white blood cells can respond to a site of infection and phagocytize the invading bacteria

So, the correct answer is 'Neutrophils and monocytes'