To determine which of the options is a viroid disease, we need to understand what a viroid is. Viroids are small, circular RNA molecules that can infect plants and cause disease. They lack a protein coat and are primarily known to affect certain agricultural crops.

1. **Potato leaf roll** - Caused by a virus.
2. **Citrus canker** - Caused by a bacterium.
3. **Potato acuba mosaic** - Caused by a virus.
4. **Potato spindle tuber** - Caused by a viroid.

### Final Answer
The viroid disease among the given options is **Potato spindle tuber**.

Question

To determine which of the options is a viroid disease, we need to understand what a viroid is. Viroids are small, circular RNA molecules that can infect plants and cause disease. They lack a protein coat and are primarily known to affect certain agricultural crops.

1. **Potato leaf roll** - Caused by a virus.
2. **Citrus canker** - Caused by a bacterium.
3. **Potato acuba mosaic** - Caused by a virus.
4. **Potato spindle tuber** - Caused by a viroid.

### Final Answer
The viroid disease among the given options is **Potato spindle tuber**.

Knowee AI · Accepted Answer

To determine which of the options is a viroid disease, we need to understand what a viroid is. Viroids are small, circular RNA molecules that can infect plants and cause disease. They lack a protein coat and are primarily known to affect certain agricultural crops.

1. **Potato leaf roll** - Caused by a virus.
2. **Citrus canker** - Caused by a bacterium.
3. **Potato acuba mosaic** - Caused by a virus.
4. **Potato spindle tuber** - Caused by a viroid.

### Final Answer
The viroid disease among the given options is **Potato spindle tuber**.

Which of the following is a viroid disease? Potato leaf roll Citrus canker Potato acuba mosaic Potato spindle tuber

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