Anti Bodies
Each IgA antibody molecule consists of

four polypeptide chain and has two antigen binding site
three polypeptide chain and has two antigen binding site
two polypeptide chain and has one antigen binding site
two polypeptide chain and has two antigen binding site

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Anti Bodies
Monoclonal refers to

All of these
a single clone of antibody-producing cells
all the antibody molecules which are identical
the binding with same antigenic site with identical binding affinities

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