Which substance, on introduction into human body forms antibody?
A
Antigen
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B
Antibody
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C
Histamine
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D
Both a and b
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Solution
The correct option is A Antigen Antigen on introduction into human body forms antibody. An antigen is a foreign substance which is specifically bound by antibodies. Antigens are usually proteins, peptides and polysaccharides which are targeted by antibodies.
So, the correct answer is Antigen.