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Antigen is a substance which (a) lowers body temperatures (b) destroys harmful bacteria

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Antigen is a substance which

(a) lowers body temperatures

(b) destroys harmful bacteria

(c) triggers the immune system

(d) is used as an antidote to poison
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(c) Antigen is a foreign molecule that invade the body of an organism. Antigen also induce immune response to stimulate lymphocyte to produce antibody. The majority of them are proteins and polysaccharides found on the wall of bacteria and on the cell coats of virus.

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