A nonspecific immunity is

Options

A. Passive immunity
B. Active immunity
C. Innate immunity
D. Autoimmunity

Answer

To answer the question "A nonspecific immunity is", we need to analyze the options provided: passive immunity, active immunity, innate immunity, and autoimmunity.

### Step-by-Step Solution:

1. **Understanding Nonspecific Immunity**:
- Nonspecific immunity refers to the body's general defense mechanisms that are not tailored to specific pathogens. This type of immunity is always present and acts as the first line of defense against infections.

2. **Identifying the Types of Immunity**:
- **Passive Immunity**: This immunity is acquired when antibodies are transferred from one individual to another, such as from mother to child through breast milk. It is not produced by the individual's immune system.
- **Active Immunity**: This immunity develops when the body is exposed to a pathogen and produces its own antibodies in response. This can occur naturally through infection or artificially through vaccination.
- **Innate Immunity**: This is another term for nonspecific immunity. It includes physical barriers (like skin), chemical barriers (like stomach acid), and immune cells that respond to all pathogens in a generic way.
- **Autoimmunity**: This occurs when the immune system mistakenly attacks the body's own cells, leading to autoimmune diseases.

3. **Selecting the Correct Answer**:
- Since the question specifically asks for nonspecific immunity, the correct answer is **innate immunity**. This type of immunity is not specific to any particular pathogen and is always present in the body.

### Final Answer:
The correct answer is **innate immunity**.

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