The correct option is D monocytes
Macrophages are phagocytic in nature. Macrophages can engulf the foreign organism and digest them, thereby protecting the body from any kind of infections. Macrophages are derived from monocytes.
Lymphocytes are white blood cells which have a role in mediating immune response against pathogens. The two types of lymphocytes are B and T lymphocytes.
Basophils are a type of granulocytic white blood cell. Basophils release chemicals like histamines, serotonin and heparin.
Eosinophils are a type of granulocytic white blood cells. They have a role in allergic reactions.