Antibody
Simulation of which of the following will lead to appearance of first antibody to appear following stimulation by an antigen?

IgA
IgM
IgG
IgE

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Antibody
The secretary component of sIgA is

made by plasma cells that secrete dimeric IgA
formed by cleavage of an epithelial cell receptor used to transport the dimeric IgA across the epithelial cell
added to dimeric IgA by the M cell
made by T cells

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