Which of following components does not participate in innate immunity ?

Options

A. Neutrophils
B. Macrophages
C. B-lymphocytes
D. Natural killer cells

Explanation

**Step-by-Step Solution:**

1. **Understanding the Immune System**: The immune system is divided into two main types: innate immunity and adaptive immunity. Innate immunity is the body's first line of defense against pathogens and is non-specific, meaning it responds to all pathogens in the same way.

2. **Components of Innate Immunity**: Innate immunity includes various components such as:
- **Neutrophils**: These are white blood cells that are part of the innate immune response and help fight infections.
- **Macrophages**: These cells are also part of the innate immune system and play a crucial role in engulfing and destroying pathogens.
- **Natural Killer (NK) Cells**: These are another type of white blood cell involved in the innate immune response, targeting infected or cancerous cells.

3. **Components of Adaptive Immunity**: Adaptive immunity is characterized by its specificity and memory. It involves:
- **B Lymphocytes (B Cells)**: These cells are part of the adaptive immune system and are responsible for producing antibodies against specific antigens.
- **T Lymphocytes (T Cells)**: These are also part of the adaptive immune system and help in targeting specific pathogens.

4. **Identifying the Correct Answer**: The question asks which component does not participate in innate immunity. From the components listed:
- Neutrophils: Part of innate immunity.
- Macrophages: Part of innate immunity.
- Natural Killer Cells: Part of innate immunity.
- B Lymphocytes: Part of adaptive immunity.

5. **Conclusion**: The component that does not participate in innate immunity is **B Lymphocytes**.

**Final Answer**: B Lymphocytes (Option C) do not participate in innate immunity.

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