Q. Assertion : is the most abundant class of Igs in the body.
Reason : is mainly found in sweat, tears, saliva, mucus, colostrum and gastro intestinal secretions.

 1590  206 Human Health and Disease Report Error

Solution:

is the most abundant class of in the body constituting approximately of the total . It is found in the blood, lymph and intestine. is mainly found in sweat, tears, saliva, mucus, colostrum (first milk secreted by a mother) and gastrointestinal secretions.