Match List-I with List-II
| LIST-I | LIST-II |
|---|---|
| Types of immunity | Examples |
| (A) Humoral immune response | (I) Natural infection |
| (B) Cell mediated immunity | (II) Colostrum |
| (C) Active immunity | (III) IgG |
| (D) Passive immunity | (IV) T-lymphocyte |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A) - (III), (B) - (IV), (C) - (I), (D) - (II)
(A) Humoral immune response — this matches (III) IgG. B-lymphocytes produce antibodies such as IgA, IgM, IgE and IgG. Because these antibodies are found in the blood (the body fluid, or ‘humour’), the response is called humoral.
(B) Cell mediated immunity — this matches (IV) T-lymphocyte. Here the cells themselves act, not antibodies. CMI is carried out by T-lymphocytes, and it is also the reason why a transplanted organ can be rejected.
(C) Active immunity — this matches (I) Natural infection. When the body meets an antigen, as in a natural infection or a vaccine, it makes its own antibodies. This is slow to build up but lasts long.
(D) Passive immunity — this matches (II) Colostrum. Ready-made antibodies are given to the body. The colostrum, the first milk of the mother, is rich in IgA antibodies that protect the newborn.