White blood cells use to identify foreign substances in the body.
a.
platelets and white blood cells
b.
antibodies and antigens
c.
enzymes and red blood cells
d.
white blood cells and red blood cells

The correct answer is:

B.
antibodies and antigens

The white blood cells use antibodies and antigens, because its part of the immunological system

Explanation:

White blood cells are the character of the immune system. Some white blood cells arrest invading bacteria and then slaughter them or move them to other organs of the body where they will be reduced. Your white blood cells are the officers of your body. They protect you against bacteria, tumors, and other foreign substances. White blood cells protect the body by combating off or killing the bacteria, pathogen or microorganism that created it. They do this by ingesting harmful foreign bodies.