Which description matches a virus described as a filterable virus?

• A. Common cold
• B. Bacteria
• C. Fungi
• D. Algae

Answer: (A)

Filterable viruses are infectious agents small enough to pass through filters that trap bacteria, revealing they are not cellular organisms like bacteria, fungi, or algae. The common cold is caused by a virus, so it fits this description as something that can pass through such filters. The other options are cellular life forms (bacteria, fungi, algae) and are not described as viruses or filterable viruses. So the illness described as filterable aligns with the common cold.