Question

this immunoglobulin is found in breast milk, nasal fluid, tears, sweat, and gastric juices.
multiple choice
○ igm
○ igd
○ igg
○ iga

Explanation:

IgA (Immunoglobulin A) is known to be present in secretions like breast milk, nasal fluid, tears, sweat, and gastric juices. IgM is the first antibody in primary immune response, IgD has a role in B - cell activation, and IgG is the main antibody in secondary immune response and is found in blood and extracellular fluid, not in these secretions. So the correct answer is IgA.

Answer:

D. IgA