Cell mediated as well as humoral immunity is provided by

Options

A. PTH
B. Glucocorticoid
C. Thymosin
D. Thiamine

Answer

To answer the question regarding which cells provide both cell-mediated and humoral immunity, we can break down the information step by step.

### Step-by-Step Solution:

1. **Understanding Immunity Types**:
- There are two main types of immunity: cell-mediated immunity and humoral immunity.
- Cell-mediated immunity primarily involves T lymphocytes (T cells).
- Humoral immunity primarily involves B lymphocytes (B cells).

2. **Role of the Thymus**:
- The thymus is an important organ in the immune system.
- It is classified as a primary lymphoid organ and is responsible for the maturation of T lymphocytes.
- The thymus releases a hormone called thymosin, which aids in the development of T cells.

3. **Function of T Lymphocytes**:
- T lymphocytes are crucial for cell-mediated immunity.
- They help in directly attacking infected cells and coordinating the immune response.

4. **Function of B Lymphocytes**:
- B lymphocytes are responsible for humoral immunity.
- They produce antibodies that circulate in the blood and help neutralize pathogens.

5. **Conclusion**:
- In summary, cell-mediated immunity is provided by T lymphocytes, while humoral immunity is provided by B lymphocytes.
- Therefore, the correct answer to the question is that both types of immunity are provided by different types of lymphocytes: T cells for cell-mediated immunity and B cells for humoral immunity.

### Final Answer:
Cell-mediated immunity is provided by T lymphocytes, and humoral immunity is provided by B lymphocytes.

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