Choose the wrong statement :

Options

A. HIV virus has RNA as its genetic material
B. HIV virus replicates in `T_(h)`- lymphocytes
C. Anti-retroviral drugs are only partially effective for AIDS therapy
D. Time-lag between infection and appearance of AlDS symptoms vary from few hours to a week

Answer

To solve the question of identifying the wrong statement regarding HIV and AIDS, we can analyze each statement provided:

1. **Statement 1: HIV virus has RNA as its genetic material.**
- This statement is **correct**. HIV (Human Immunodeficiency Virus) is indeed a retrovirus that contains RNA as its genetic material.

2. **Statement 2: HIV virus replicates in T-Helper lymphocytes.**
- This statement is also **correct**. HIV specifically targets T-helper cells (a type of white blood cell) and replicates within them, leading to a weakened immune system.

3. **Statement 3: Anti-retroviral drugs are only partially effective for AIDS therapy.**
- This statement is **correct**. While antiretroviral therapy can manage HIV infection and prolong life, there is currently no cure for AIDS, and the drugs are not fully effective in eradicating the virus.

4. **Statement 4: Time lag between infection and appearance of AIDS symptoms may vary from few hours to a week.**
- This statement is **incorrect**. The incubation period for HIV, which is the time from infection to the appearance of symptoms, is typically much longer than a few hours to a week. It can take several weeks to months for symptoms to appear after initial infection.

Based on this analysis, the wrong statement is the fourth one.

### Final Answer:
The wrong statement is: **Time lag between infection and appearance of AIDS symptoms may vary from few hours to a week.**

---