Identify the correct pair having double stranded RNA

Options

A. Cauliflower mosaic virus and Dahlia mosaic virus
B. Poliovirus and Wound tumour virus
C. Tobacco mosaic virus and Reovirus
D. Wound tumour virus and Reovirus.

Answer

To solve the question of identifying the correct pair of viruses that have double-stranded RNA, we will analyze each of the provided options step by step.

### Step-by-Step Solution:

1. **Understanding the Question**:
We need to find a pair of viruses that both have double-stranded RNA (dsRNA) genomes.

2. **Analyzing Option 1**:
- **Cauliflower Mosaic Virus**: This virus has a circular double-stranded DNA genome, not RNA.
- **Dahlia Mosaic Virus**: This virus also contains double-stranded DNA.
- **Conclusion**: Both viruses in this option have DNA, so this pair is incorrect.

3. **Analyzing Option 2**:
- **Poliovirus**: This virus has a single-stranded positive-sense RNA genome.
- **Wound Tumor Virus**: This virus has a double-stranded RNA genome.
- **Conclusion**: Since poliovirus has single-stranded RNA, this pair is incorrect.

4. **Analyzing Option 3**:
- **Tobacco Mosaic Virus (TMV)**: This virus is a positive-sense single-stranded RNA virus.
- **Rheovirus**: This virus has a double-stranded RNA genome.
- **Conclusion**: Since TMV has single-stranded RNA, this pair is also incorrect.

5. **Analyzing Option 4**:
- **Wound Tumor Virus**: As previously mentioned, this virus has a double-stranded RNA genome.
- **Rheovirus**: This virus also has a double-stranded RNA genome, with 10 to 12 segments of RNA.
- **Conclusion**: Both viruses in this option have double-stranded RNA, making this pair correct.

### Final Answer:
The correct pair having double-stranded RNA is **Wound Tumor Virus and Rheovirus**.