Natural killer NK cells for a) antibodies b) erythrocytes c) Lymphocytes d) Opsonins?

a) Natural killer (NK) cells do not produce antibodies. They are a type of cytotoxic lymphocyte that can directly kill virus-infected cells and tumor cells.

b) NK cells do not target erythrocytes (red blood cells). They primarily target virus-infected cells and tumor cells.

c) NK cells can target and kill lymphocytes, including abnormal or infected lymphocytes such as those infected with viruses.

d) NK cells do not use opsonins to target cells for destruction. They primarily rely on their own cytotoxic mechanisms to kill target cells.

a) antibodies