A person likely to develop tetanus is immunized by administering anti-tetunus injection
or
When a quick immune response is required due to infection of a deadly microbes, the patient is injected with

Options

A. (a) Wide spectrum antibiotics
B. (b) Weakened germs
C. (c) Dead germs
D. (d) Preformed antibodies

Answer

**Step-by-Step Solution:**

1. **Understanding Tetanus and Immunization**: Tetanus is caused by the bacterium Clostridium tetani. To prevent tetanus, individuals can receive an anti-tetanus injection, which is crucial for those at risk of developing the disease.

2. **Types of Immunity**: There are two main types of immunity:
- **Active Immunity**: This occurs when the body produces its own antibodies in response to an infection or vaccination. This process takes time.
- **Passive Immunity**: This involves the introduction of pre-formed antibodies into the body, providing immediate protection but not long-lasting immunity.

3. **Anti-Tetanus Injection**: The anti-tetanus injection contains preformed antibodies against the toxin produced by Clostridium tetani. This injection provides passive immunity, which is essential for immediate protection against tetanus, especially in individuals who may not have enough time to develop their own antibodies.

4. **Quick Immune Response**: In cases where a quick immune response is necessary, such as when a person is exposed to a deadly microbe, the administration of preformed antibodies is crucial. This is because it allows the body to have immediate defense against the pathogen without the delay associated with the body’s own immune response.

5. **Evaluating the Options**:
- A) Wide spectrum antibiotics: Incorrect, as antibiotics do not provide immunity.
- B) Weakened germs: Incorrect, as this refers to a method of active immunity.
- C) Dead germs: Incorrect, as this also refers to a method of active immunity.
- D) Preformed antibodies: Correct, as this represents passive immunity and provides immediate protection.

6. **Conclusion**: The correct answer is D) preformed antibodies, as they are used for quick immune response and are part of the anti-tetanus injection.

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