HIV that causes AIDS, first starts destroying

Options

A. B-lymphocytes
B. Leucocytes
C. Helper T-lymphocytes
D. Thrombocytes

Explanation

### Step-by-Step Solution:

1. **Understand the Virus**: The question refers to HIV, which stands for Human Immunodeficiency Virus. It is an RNA virus that leads to AIDS (Acquired Immunodeficiency Syndrome).

2. **Identify the Target Cells**: HIV primarily targets the immune system, specifically a type of white blood cell known as lymphocytes. Within lymphocytes, there are two main types: B lymphocytes and T lymphocytes.

3. **Focus on T Lymphocytes**: T lymphocytes can be further divided into several subtypes, including T-helper cells, T-suppressor cells, T-killer cells, and T-memory cells. Among these, T-helper cells play a crucial role in the immune response.

4. **Mechanism of HIV**: When HIV infects the body, it specifically attacks and destroys T-helper lymphocytes. This leads to a decrease in their numbers.

5. **Consequences of T-helper Cell Destruction**: The reduction in T-helper cells results in a weakened immune system, making the individual more susceptible to various infections and diseases, such as candidiasis, tuberculosis (TB), and other opportunistic infections.

6. **Conclusion**: Therefore, the correct answer to the question is that HIV first starts destroying **T-helper lymphocytes**.

### Final Answer:
HIV that causes AIDS first starts destroying **T-helper lymphocytes**.

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