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 select the best answer from the choices provided. a b c d

Antibodies and antigens

B

Explanation:

The White blood corpuscles or shortly called WBC are involved in protecting the body from the pathogenic and foreign substance which are called antigens.

The WBC when senses the antigens, it immediately signals the T cells for the production of antibodies which reaches the infection site.

In the site, antigen-antibody interaction occurs due to which the antigen gets destroyed.

Thus it can be inferred that option B is best answer form the choice provided.

it contracts and pulls the lungs downwards. this opens the lungs and chest cavity and allows air to come into the lungs.