Question

Match the following:

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

Hint:

Active = "Antigen entered" (the body makes the antibody).
Passive = "Antibody entered" (preformed antibodies are given).
Natural = normal life process; Artificial = medical needle (injection).

Answer 1

The Correct Option is B

Step 1: Separate the two axes of classification.
One axis is who made the antibodies, active means the body makes them, passive means they are received ready-made. The other axis is how exposure happened, natural through infection or transfer, artificial through medical intervention.
Step 2: Build each combination first.
Natural active comes from actually catching a disease like chickenpox. Natural passive comes from antibodies crossing from mother to baby. Artificial active comes from vaccination. Artificial passive comes from injecting ready-made antiserum.
Step 3: Match against the list.
Once each of the four combinations is fixed to its real-life example, slot the List-I items against these fixed examples rather than guessing option by option.
Final answer: Option 2, matching A-IV, B-I, C-II, D-III.