Which set of examples belongs to the same phylum?

Options

A. Sepia and Laccifer
B. Corallium and Leucosolenia
C. Ancylostoma and Enterobius
D. Balanoglossus and Corvus

Answer

To determine which set of examples belongs to the same phylum, we will analyze each pair of organisms provided in the options.

### Step-by-Step Solution:

1. **Analyze the first option: Sepia and Leucifer**
- **Sepia**: This organism is a type of cuttlefish and belongs to the phylum **Mollusca**.
- **Leucifer**: This organism is a type of shrimp and belongs to the phylum **Arthropoda**.
- **Conclusion**: Sepia and Leucifer belong to different phyla.

2. **Analyze the second option: Corallium and Leucosolenia**
- **Corallium**: This organism is a type of coral and belongs to the phylum **Cnidaria**.
- **Leucosolenia**: This organism is a type of sponge and belongs to the phylum **Porifera**.
- **Conclusion**: Corallium and Leucosolenia belong to different phyla.

3. **Analyze the third option: Encylostoma and Enterobius**
- **Encylostoma**: This organism is a type of hookworm and belongs to the phylum **Nematoda** (roundworms).
- **Enterobius**: This organism is a type of pinworm and also belongs to the phylum **Nematoda**.
- **Conclusion**: Encylostoma and Enterobius belong to the same phylum.

4. **Analyze the fourth option: Valenoglossus and Corvus**
- **Valenoglossus**: This organism is a type of acorn worm and belongs to the phylum **Hemichordata**.
- **Corvus**: This organism is a type of bird (crow) and belongs to the phylum **Chordata**.
- **Conclusion**: Valenoglossus and Corvus belong to different phyla.

### Final Answer:
The correct option where both examples belong to the same phylum is **Encylostoma and Enterobius** (Option 3).

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