Question:
Tetanus antitoxin, when injected into the human body, immediately provides which kind of immunity ? Choose the correct option.
Tetanus antitoxin, when injected into the human body, immediately provides which kind of immunity ? Choose the correct option.
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Antitoxin is a readymade antibody, so the immunity it gives is passive and immediate.
Updated On: Oct 23, 2026
- Innate immunity
- Passive immunity
- Autoimmunity
- Active immunity
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The Correct Option is B
Solution and Explanation
Step 1: Understand what is injected:
Tetanus antitoxin is a ready-made preparation of antibodies. It is injected when a person has a deep wound and has not been vaccinated.
Step 2: Recall the types of immunity:
When the body is given ready-made antibodies, the immunity is passive. It acts at once but does not last long.
When the body makes its own antibodies after seeing an antigen, the immunity is active. It takes time to build.
Step 3: Check each option:
(A) Innate immunity is the non-specific defence present from birth, such as skin and mucus. It is not given by injection.
(B) Passive immunity is correct because the antibodies are supplied from outside.
(C) Autoimmunity is a disorder where the body attacks its own cells.
(D) Active immunity needs the body to produce antibodies itself, so it is not immediate.
Final Answer:
Ready-made antibodies give passive immunity at once. The answer is option (B).
Tetanus antitoxin is a ready-made preparation of antibodies. It is injected when a person has a deep wound and has not been vaccinated.
Step 2: Recall the types of immunity:
When the body is given ready-made antibodies, the immunity is passive. It acts at once but does not last long.
When the body makes its own antibodies after seeing an antigen, the immunity is active. It takes time to build.
Step 3: Check each option:
(A) Innate immunity is the non-specific defence present from birth, such as skin and mucus. It is not given by injection.
(B) Passive immunity is correct because the antibodies are supplied from outside.
(C) Autoimmunity is a disorder where the body attacks its own cells.
(D) Active immunity needs the body to produce antibodies itself, so it is not immediate.
Final Answer:
Ready-made antibodies give passive immunity at once. The answer is option (B).
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