After extracting an organism, the scientist listed out the below features about it:
(i) smaller than a virus,
(ii) its nucleic acid had ribose as sugar , and
(iii) lacks a protein coat .
Which of the following diseases is likely to be produced by it?

Options

A. Potato spindle tuber disease
B. Influenza
C. Potato leaf curl
D. Mad cow disease

Answer

To solve the question, we need to analyze the features of the organism provided and identify the disease it is likely to cause. Let's break down the information step by step.

### Step-by-Step Solution:

1. **Identify the Features of the Organism:**
- The organism is described as smaller than a virus.
- Its nucleic acid contains ribose as the sugar component.
- It lacks a protein coat.

2. **Understanding the Characteristics:**
- The fact that it is smaller than a virus suggests that it is not a typical virus but rather a simpler infectious agent.
- The presence of ribose indicates that the nucleic acid is RNA, as ribose is a sugar found in RNA (not in DNA).
- The absence of a protein coat is a key characteristic of viroids, which are known to be composed solely of RNA without any protein encapsulation.

3. **Identifying the Organism:**
- Based on the features listed, we can conclude that the organism is a **viroid**. Viroids are known to be the smallest infectious agents and are responsible for certain plant diseases.

4. **Determining the Disease Caused:**
- Viroids are known to cause specific diseases in plants. One well-known disease caused by a viroid is **Potato Spindle Tuber Disease**.
- Other options provided (Influenza, Potato Leaf Curl, Mad Cow Disease) are caused by viruses or prions, not viroids.

5. **Conclusion:**
- The disease likely produced by the organism described is **Potato Spindle Tuber Disease**.

### Final Answer:
The disease likely to be produced by the organism is **Potato Spindle Tuber Disease**.

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