White blood cells engulf bacteria through this process.
a) exocytosis
b) phagocytosis
c) pinocytosis
d) osmosis
e) receptor-mediated exocytosis

Phagocytosis

Explanation:

White blood cells are the very important part of the immune system which has the ability to kill the harmful substances that reach the body.

They patrol like police inside the circulatory system and wipe out the pathogens like bacteria and virus by the process known as phagocytosis. They engulf these harmful particles and in this way it kills the cells.

hence, the correct answer is option B

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic