Question

Match the following antibodies with their correct description:

Antibody	Description
P. IgE	(i) Cross the placenta
Q. IgG	(ii) Dominant antibody produced in immune responses
R. IgM	(iii) It is found in the mother's milk
S. IgA	(iv) Responsible for autoimmune responses including allergies

• A. P(i), Q(iii), R(ii), S(iv)
• B. P(i), Q(ii), R(iii), S(iv)
• C. P(iv), Q(ii), R(iii), S(i)
• D. P(iv), Q(i), R(ii), S(iii)

Hint:

- IgE is involved in allergic reactions, IgG crosses the placenta to provide immunity to the fetus, IgM is the first response antibody, and IgA is found in mucosal areas like breast milk. 
- These antibodies are key to understanding immune responses and vaccine development.

Answer 1

The Correct Option is D

The following are the descriptions for each antibody: 
- P. IgE: (iv) Responsible for autoimmune responses including allergies. IgE is involved in allergic reactions and immune responses to parasites. 
- Q. IgG: (i) Cross the placenta. IgG is the only antibody class that can cross the placenta, providing passive immunity to the fetus. 
- R. IgM: (ii) Dominant antibody produced in immune responses. IgM is the first antibody produced during an immune response and is crucial in the early immune defense. 
- S. IgA: (iii) It is found in the mother's milk. IgA is the primary antibody found in mucosal surfaces such as breast milk, providing passive immunity to the newborn. 

Thus, the correct matching is P(iv), Q(i), R(ii), S(iii).