Anti Bodies
The immunoglobulin fold is

both (a) and (b)
a β-barrel composed of a three- and a four-stranded antiparallel β-sheet
found six times in the IgG molecule
found only in IgG molecules

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Anti Bodies
Monoclonal refers to

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

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Anti Bodies
IgE provides

secretions in the body
complement killings of the cells and phagocytosis
All of these
immunity against some parasites

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