HIV decreases natural immunity of the body by

Options

A. Destroying antibodies
B. Attacking T-lymphocytes
C. Destroying erythrocytes
D. Attacking B-lymphocytes

Explanation

**Step-by-Step Solution:**

1. **Understanding HIV**:
- HIV stands for Human Immunodeficiency Virus. It is a type of retrovirus, which means it is an RNA virus that can convert its RNA into DNA using an enzyme called reverse transcriptase.

2. **Mechanism of Action**:
- Once HIV enters the bloodstream, it specifically targets and attacks T-lymphocyte cells (also known as T-cells). These cells play a crucial role in the immune system by helping to coordinate the body's immune response.

3. **Impact on Immunity**:
- The attack on T-lymphocytes leads to a decrease in the body's natural immunity. As T-cells are essential for fighting off infections, their destruction or dysfunction results in a weakened immune system.

4. **Consequences of Decreased Immunity**:
- With a reduced number of functional T-lymphocytes, the body becomes more susceptible to infections from viruses, bacteria, and fungi. This condition is known as Acquired Immunodeficiency Syndrome (AIDS), which is the advanced stage of HIV infection.

5. **Evaluating Options**:
- When considering the options provided in the question:
- Option 1: Destroying antibodies - Incorrect, as HIV does not primarily target antibodies.
- Option 2: Attacking T-lymphocyte - Correct, as this is the primary mechanism by which HIV decreases immunity.
- Option 3: Destroying erythrocytes - Incorrect, as HIV does not target red blood cells.
- Option 4: Attacking B-lymphocyte - Incorrect, as HIV primarily attacks T-lymphocytes.

6. **Conclusion**:
- Therefore, the correct answer to the question "HIV decreases natural immunity of the body by" is **attacking T-lymphocyte cells**.

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