Viruses are non-cellular organisms but relicate themselves one they infect the host cell. To which of the following kingdom do viruses belong to ?

Options

A. Monera
B. Protista
C. Fungi
D. None of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Viruses**: Begin by recognizing that viruses are unique entities that are classified as non-cellular organisms. They do not have a cellular structure like bacteria, plants, or animals.

2. **Replication of Viruses**: Note that viruses can replicate themselves only after they infect a host cell. This characteristic is crucial in understanding their behavior and classification.

3. **Five Kingdom Classification**: Familiarize yourself with the five kingdom classification system, which includes Monera, Protista, Fungi, Plantae, and Animalia. Each kingdom has specific characteristics that define its members.

4. **Analyzing the Options**:
- **Monera**: This kingdom includes unicellular prokaryotes, such as bacteria. Since viruses are not prokaryotic and do not have cellular structures, they do not belong here.
- **Protista**: This kingdom includes unicellular eukaryotes. Viruses are not eukaryotic and thus do not fit into this category either.
- **Fungi**: This kingdom consists of multicellular and unicellular heterotrophic organisms that are cellular and lack chlorophyll. Again, viruses do not belong here.
- **None of the Above**: Given that viruses do not fit into any of the aforementioned kingdoms, this option becomes a strong candidate.

5. **Conclusion**: Since viruses do not belong to any of the specified kingdoms due to their non-cellular nature and inability to be classified as truly living organisms, the correct answer is "none of the above".

**Final Answer**: Viruses belong to none of the above kingdoms.

---