Lymphocytes that inhibit the development and proliferation of T and B cell are

Options

A. B cells
B. suppressor T cells
C. macrophages
D. neutrophils

Answer

To answer the question "Lymphocytes that inhibit the development and proliferation of T and B cells are," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Lymphocytes**:
- Lymphocytes are a type of white blood cell (WBC) that play a crucial role in the immune response. The main types of lymphocytes include T cells, B cells, and natural killer (NK) cells.

2. **Identify the Role of T and B Cells**:
- T cells are involved in cell-mediated immunity, while B cells are responsible for producing antibodies. Both types of cells are essential for the adaptive immune response.

3. **Recognize the Function of Suppressor T Cells**:
- Suppressor T cells, also known as regulatory T cells (Tregs), are a subset of T cells that help regulate or suppress other immune cells. Their primary role is to inhibit the activation and proliferation of T cells and B cells.

4. **Evaluate the Options**:
- **B cells**: These are responsible for antibody production, not inhibition.
- **Suppressor T cells**: These specifically inhibit the development and proliferation of T and B cells.
- **Macrophages**: These are phagocytic cells involved in innate immunity, not specifically in the suppression of T and B cells.
- **Neutrophils**: These are also a type of granular WBC involved in the innate immune response and do not suppress other cells.

5. **Select the Correct Answer**:
- Based on the roles and functions discussed, the correct answer is **suppressor T cells** (option B).

### Final Answer:
The lymphocytes that inhibit the development and proliferation of T and B cells are **suppressor T cells**.

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