Immunoglobulin present in mouth local secretions?: (A) IgA, (B) IgM, (C) IgG, (D) IgE
Answer is A. Ans. is 'a' i.e.,IgA It is the second most abundant antibody (after IgG). It is major immunoglobulin in clostrum, saliva, tears, respiratory and gastrointestinal secretions.