Which of the following viruses has DNA ?

Options

A. Tobacco Mosaic Virus
B. Cauliflower Mosaic Virus
C. Tomato Mosaic Virus
D. Potato Mosaic Virus

Answer

To determine which of the given viruses has DNA, we can follow these steps:

### Step 1: Understand the Types of Viruses
Viruses can have either RNA or DNA as their genetic material. It is essential to identify the type of nucleic acid present in each virus listed in the options.

### Step 2: Analyze Each Option
1. **Tobacco Mosaic Virus (TMV)**: This virus is known to have RNA as its genetic material. Therefore, it does not have DNA.
2. **Cauliflower Mosaic Virus**: This virus is known to have DNA as its genetic material. It is a DNA virus.
3. **Tomato Mosaic Virus**: Similar to TMV, this virus also contains RNA as its genetic material.
4. **Potato Mosaic Virus**: Like the previous two, this virus also has RNA as its genetic material.

### Step 3: Identify the Correct Answer
From the analysis, we see that:
- Tobacco Mosaic Virus: RNA
- Cauliflower Mosaic Virus: DNA
- Tomato Mosaic Virus: RNA
- Potato Mosaic Virus: RNA

Thus, the only virus among the options that has DNA is the **Cauliflower Mosaic Virus**.

### Final Answer
The virus that has DNA is **Cauliflower Mosaic Virus**.

---