Passive immunity is provided through

Options

A. Exogenous supply of antigens
B. Exogenous supply of antibodies
C. Endogenous supply of antigens
D. Endogenous supply of antibodies

Answer

### Step-by-Step Solution:

1. **Understanding Immunity**:
- Immunity refers to the body's ability to resist infections caused by pathogens (germs).
- It is the defense mechanism that protects the body from diseases.

2. **Types of Immunity**:
- Immunity can be classified into two main types:
- **Innate Immunity**: This is the natural immunity present from birth, determined by genetic factors.
- **Acquired Immunity**: This immunity is developed after exposure to pathogens or through vaccination.

3. **Subtypes of Acquired Immunity**:
- Acquired immunity is further divided into:
- **Active Acquired Immunity**: This type develops when the body is exposed to a pathogen and produces its own antibodies.
- **Passive Acquired Immunity**: This type involves the direct introduction of antibodies into the body from an external source.

4. **Defining Passive Immunity**:
- Passive immunity is characterized by the direct supply of prepared antibodies to an individual.
- This can occur naturally (e.g., through maternal antibodies passed to a baby) or artificially (e.g., through antibody injections).

5. **Conclusion**:
- Therefore, passive immunity is provided through the **exogenous supply of antibodies**.

### Final Answer:
Passive immunity is provided through the **exogenous supply of antibodies**.

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