## Core Concept
The question tests the classification of viruses based on their genetic material. Viruses can have either DNA or RNA as their genetic material, and this fundamental characteristic is crucial for their identification and study. RNA viruses, also known as riboviruses, are a diverse group of viruses that use RNA as their genetic material.

## Why the Correct Answer is Right
The correct answer, , corresponds to a virus that is known to have RNA as its genetic material. RNA viruses include several families, such as Orthomyxoviridae (influenza viruses), Paramyxoviridae (measles and mumps viruses), and Coronaviridae (coronaviruses). These viruses have a single-stranded RNA genome, which can be either positive-sense or negative-sense.

## Why Each Wrong Option is Incorrect
* **Option A:** - This option is incorrect because is known to be a DNA virus. DNA viruses have a double-stranded DNA genome and include families like Herpesviridae (herpesviruses) and Adenoviridae (adenoviruses).
* **Option B:** - This option is incorrect because is also a DNA virus.
* **Option D:** - This option is incorrect because can be classified under a different category or is not an RNA virus.

## Clinical Pearl / High-Yield Fact
A key point to remember is that RNA viruses are more prone to mutations due to the error-prone nature of their RNA-dependent RNA polymerase. This characteristic makes them more adaptable and capable of rapid evolution, which is a significant factor in their ability to cause emerging and re-emerging infections.

## Correct Answer Line
**Correct Answer: C. **