Match the following Antibody types with where they are found:

Question

Match the following Antibody types with where they are found:

i. IgA - 4. Mucosal secretions like saliva, tears, and breast milk

ii. IgG - 1. Blood and extracellular fluid

iii. IgD - 2. Surface of immature B cells

iv. IgE - 3. Basophils and mastocytes

1. A. i-4, ii-1, iii-2, iv-3 (Correct answer)
2. B. i-3, ii-4, iii-1, iv-2
3. C. i-1, ii-3, iii-2, iv-4
4. D. i-2, ii-1, iii-4, iv-3

Correct Answer

Option A — i-4, ii-1, iii-2, iv-3

Detailed Solution & Explanation

The correct answer is i-4, ii-1, iii-2, iv-3.

Key Points

• IgA = secretory antibody in mucosal surfaces; IgG = most abundant in blood; IgD = B cell surface receptor on naive B cells; IgE = bound to mast cells and basophils (involved in allergy and parasite defense).