Anti Bodies
Each IgA antibody molecule consists of

three polypeptide chain and has two antigen binding site
four 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

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

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