The antibody present in secretions like tears and saliva is ____________
(a) IgA
(b) IgE
(c) IgG
(d) IgM
I have been asked this question in an online quiz.
My question is taken from Complementary Interactions Between Proteins and Ligands: The Immune System and Immunoglobulins in chapter Three Dimensional Structure Of Proteins and Protein Function of Biochemistry