White blood cell act
A
As a defence against infection
B
As a source of energy
C
For clotting blood
D
As a medium for oxygen transport from lung to tissues
Correct Answer: As a defence against infection
White blood cell, also called leukocyte or white corpuscle, a cellular component of the blood that lacks hemoglobin, has a nucleus, is capable of motility, and defends the body against infection and disease by ingesting foreign materials and cellular debris, by destroying infectious agents and cancer cells.