The antibody that is predominantly found in tears, saliva, and intestinal secretions is:

a. IgG.
b. IgA.
c. IgM.
d. IgE.


B
Each of the five different classes of antibodies has its distinctive molecular configuration and is involved in the immune reaction in a different way. IgA is secreted in body fluids and primarily protects those body surfaces lined with mucous membranes.

Biology & Microbiology

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