With respect to their classification , find the odd one out from the following.

Options

A. Sea cucumber
B. Sea hare
C. Sea lily
D. Sea urchin

Answer

To solve the question of finding the odd one out from the given list of organisms, we will analyze each option based on their classification.

### Step-by-Step Solution:

1. **Identify the Organisms and Their Scientific Names**:
- **Sea Cucumber**: Scientific name is *Cucumeria*.
- **Sea Hare**: Scientific name is *Dolabella auricularia*.
- **Sea Lily**: Scientific name is *Antidone*.
- **Sea Urchin**: Scientific name is *Echinus*.

2. **Determine the Phylum of Each Organism**:
- **Sea Cucumber**: Belongs to the phylum **Echinodermata**.
- **Sea Hare**: Belongs to the phylum **Mollusca**.
- **Sea Lily**: Belongs to the phylum **Echinodermata**.
- **Sea Urchin**: Belongs to the phylum **Echinodermata**.

3. **Group the Organisms by Phylum**:
- **Echinodermata**: Sea Cucumber, Sea Lily, Sea Urchin.
- **Mollusca**: Sea Hare.

4. **Identify the Odd One Out**:
- From the analysis, we see that three organisms (Sea Cucumber, Sea Lily, Sea Urchin) belong to the phylum **Echinodermata**, while one organism (Sea Hare) belongs to the phylum **Mollusca**.

5. **Conclusion**:
- Therefore, the odd one out is **Sea Hare** (*Dolabella auricularia*), as it is the only organism that does not belong to the phylum **Echinodermata**.

### Final Answer:
The odd one out is **Sea Hare**.

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