Cells that are capable of producing antibodies are

Options

A. B-lymphocytes
B. T-lymphocytes
C. Natural killer cells
D. Polymorphonuclear cells

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks for the type of cells that are capable of producing antibodies.

2. **Identifying the Key Players in Immune Response:**
- Antibodies are proteins that help in identifying and neutralizing pathogens like bacteria and viruses.
- The cells primarily responsible for producing antibodies are known as plasma cells.

3. **Linking Plasma Cells to Their Origin:**
- Plasma cells are derived from a specific type of white blood cell known as B lymphocytes (or B cells).
- When B lymphocytes encounter an antigen (a foreign substance), they differentiate into plasma cells, which then produce antibodies.

4. **Examining the Answer Choices:**
- **B lymphocytes:** Correct, as they are the precursor cells that differentiate into plasma cells and produce antibodies.
- **T lymphocytes:** Incorrect, as they do not produce antibodies but are involved in cell-mediated immunity.
- **Natural killer cells:** Incorrect, as they target virus-infected cells and tumor cells but do not produce antibodies.
- **Polymorphonuclear cells:** Incorrect, as these are a type of granulocyte involved in innate immunity and do not produce antibodies.

5. **Conclusion:**
The cells that are capable of producing antibodies are specifically the B lymphocytes.

**Final Answer:**
B lymphocytes

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