HIV/oncogenic viruses/retroviruses are dangerous and cause disorder in

Options

A. multiplicative stage
B. single stranded cDNA stage
C. RNA state
D. Provirus state

Explanation

To answer the question regarding HIV, oncogenic viruses, and retroviruses, we need to analyze the different stages mentioned and identify at which stage these viruses cause disorder.

### Step-by-Step Solution:

1. **Understanding the Types of Viruses**:
- HIV (Human Immunodeficiency Virus) is a type of retrovirus.
- Oncogenic viruses are those that can cause cancer.
- Retroviruses are a class of viruses that replicate in a host cell through the process of reverse transcription.

2. **Identifying the Stages**:
- The options provided are:
- A) Multiplicative stage
- B) Single-stranded cDNA stage
- C) RNA state
- D) Provirus state

3. **Analyzing the Provirus State**:
- The provirus state refers to the stage when the viral DNA (cDNA) integrates into the host cell's chromosome.
- In this state, the viral genetic material is permanently incorporated into the host's genome.

4. **Understanding the Impact of the Provirus State**:
- When the provirus is formed, it can lead to the production of new viral particles and can disrupt normal cellular functions.
- This integration can lead to disorders, including immune system failure in the case of HIV and potential cancer in the case of oncogenic viruses.

5. **Conclusion**:
- Based on the analysis, it is clear that HIV and oncogenic retroviruses are dangerous and cause disorders primarily during the provirus state.
- Therefore, the correct answer is **D) Provirus state**.