Question

Match List I with List II

Choose the correct answer from the options given below:

• A. A-III, B-I, C-II, D-IV
• B. A-IV, B-II, C-III, D-I
• C. A-II, B-III, C-IV, D-I
• D. A-IV, B-III, C-II, D-I

Hint:

- IgM = Pentamer (first antibody) - IgA = Mucosal immunity - IgD = B cell receptor - IgE = Allergy (mast cell activation)

Answer 1

The Correct Option is D

Concept: Different immunoglobulins (antibodies) have distinct structures and functions.

Step 1: Match each immunoglobulin.

• IgM → Pentamer; activates complement → A-IV
• IgA → Monomer/Dimer/Trimer; mucosal immunity → B-III
• IgD → Naïve B cell antigen receptor → C-II
• IgE → Monomer; activates mast cells → D-I

Step 2: Write correct matching.
\[ A\text{-IV},\quad B\text{-III},\quad C\text{-II},\quad D\text{-I} \]

Step 3: Final conclusion.
Thus, the correct option is: \[ (D) \]