An antibody is a

Molecule that specifically inactivates an antigen

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WBC, which invades bacteria

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Secretion of mammalian RBC

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Component of blood

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Solution

The correct option is A Molecule that specifically inactivates an antigen
An antibody is a protein produced by the body's immune system when it detects harmful foreign substances, called antigens. It is a gamma globulin protein and it is Y-shaped. It is mainly produced by the plasma cells which helps in the humoral immunity. So, the correct answer is option A.

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The part of antibody molecule which acts asa binding site for specific related antigen is

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