The correct answer is C. Ss RNA virus.
Specifically, Coronaviruses (members of the family Coronaviridae) are classified as positive-sense, single-stranded RNA (+ssRNA) viruses.
Virological Characteristics
To understand the classification of SARS-CoV-2 and other coronaviruses, we look at their genomic structure:
Genomic Material: They contain a single strand of RNA. Because it is "positive-sense," the viral RNA acts like messenger RNA (mRNA) and can be immediately translated into proteins by the host cell's ribosomes upon entry.
Size: They possess one of the largest genomes among all RNA viruses, typically ranging from 26 to 32 kilobases (kb).
Structure: The genome is packaged within a helical nucleocapsid and surrounded by an envelope containing the characteristic "spike" (S) proteins, which give the virus its crown-like (corona) appearance under electron microscopy.
Comparison with Other Viral Genomes
| Virus Type | Genomic Classification | Examples |
| ssDNA | Single-stranded DNA | Parvovirus B19 |
| dsDNA | Double-stranded DNA | Herpes Simplex Virus (HSV), HPV, Adenovirus |
| ssRNA | Single-stranded RNA | Coronavirus, Influenza, HIV, Hepatitis C |
| dsRNA | Double-stranded RNA | Rotavirus |
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