Silver fish, Lepisma is

Options

A. Mammal
B. Insect/Arthropod
C. Fish
D. Echinoderm.

Answer

**Step-by-Step Solution:**

1. **Identify the Organism**: The organism in question is Silverfish, scientifically known as Lepisma.

2. **Classify the Organism**: Silverfish belongs to the class Lepisma, which is part of the larger class Insecta.

3. **Determine the Phylum**: Since Lepisma is classified as an insect, it falls under the phylum Arthropoda, which includes all arthropods.

4. **Evaluate the Options**:
- **Option A**: States that Lepisma is a mammal. This is incorrect because mammals are vertebrates, and Lepisma is an invertebrate.
- **Option B**: States that Lepisma is an insect or arthropod. This is correct, as Silverfish is indeed an insect and belongs to the phylum Arthropoda.
- **Option C**: Claims that Silverfish is a fish. This is misleading because, despite its name, Silverfish is not a fish but an arthropod.
- **Option D**: Suggests that Lepisma is a Caenoderm. This is incorrect as it does not belong to that classification.

5. **Conclusion**: The correct answer is **Option B**: Silverfish is an insect that comes under the phylum Arthropoda.

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