## **Core Concept**
The question tests knowledge of viral classification, specifically focusing on the characteristics of viral genomes and structures. The key terms here are "non-enveloped" and "ss-RNA virus," referring to viruses that lack a lipid envelope and have single-stranded RNA as their genetic material.

## **Why the Correct Answer is Right**
The correct answer, , represents a virus that fits the given description: it is non-enveloped and has a single-stranded RNA genome. Viruses like Poliovirus, which is a non-enveloped, ssRNA virus belonging to the Picornaviridae family, match this description. These viruses are significant in human disease, causing a range of conditions from mild to severe.

## **Why Each Wrong Option is Incorrect**
- **Option A:** - This option does not fit the description provided, likely representing a virus with a different type of genetic material or structure.
- **Option B:** - Similarly, this option does not match the criteria of being non-enveloped and having ssRNA.
- **Option D:** - This option also does not align with the characteristics of a non-enveloped ssRNA virus.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that non-enveloped viruses, like those with ssRNA genomes, are often more resistant to environmental degradation and can survive outside a host for longer periods. This characteristic makes them highly infectious and capable of spreading through fecal-oral routes, as seen with Poliovirus.

## **Correct Answer:** .