Match the questions with its following description

____ indicates a very recent infection

____ Accumulates in body secretions

____ Provides in body secretions

____ Is a cell surface receptor on the mast cell

____ is a major circulation antibody

____ Is also called gamma globulin

____ is a maternal antibody that crosses the placenta

____ involved in allergic reaction

____ Booster injections of a vaccine raise the level of this antibody

A-     IgM

B-     IgE

C-     IgA

D-     IgG