Double stranded DNA as genetic material is found in some plant viruses like

Options

A. (a) Tobacco mosaic virus
B. (b) Potato virus X and Y
C. (c) Banana bunchy top virus
D. (d) Cauliflower and Dahlia mosaic virus

Answer

To solve the question regarding which plant viruses contain double-stranded DNA as their genetic material, we will analyze the options provided step by step.

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for plant viruses that have double-stranded DNA (dsDNA) as their genetic material.

2. **Review the Options**: We need to evaluate each option to determine the type of genetic material they contain.
- **Tobacco Mosaic Virus (TMV)**: This virus is known to have single-stranded RNA (ssRNA) as its genetic material.
- **Potato Virus X and Y**: Both of these viruses also contain single-stranded RNA (ssRNA).
- **Banana Bunchy Top Virus**: This virus is characterized by having single-stranded DNA (ssDNA).
- **Cauliflower Mosaic Virus and Dahlia Mosaic Virus**: These viruses are known to have double-stranded DNA (dsDNA) as their genetic material.

3. **Identify the Correct Answer**: Based on the analysis, the only option that contains double-stranded DNA is the **Cauliflower Mosaic Virus and Dahlia Mosaic Virus**.

4. **Conclusion**: Therefore, the answer to the question is that double-stranded DNA as genetic material is found in plant viruses like **Cauliflower Mosaic Virus and Dahlia Mosaic Virus**.

### Final Answer:
The correct answer is **Cauliflower Mosaic Virus and Dahlia Mosaic Virus**.

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