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 based on classification, we will analyze each organism and their respective phyla.

**Step 1: Identify the organisms and their classifications.**
- **Sea Cucumber**: Scientific name is Cucumeria. It belongs to the phylum **Echinodermata**.
- **Sea Hare**: Scientific name is Dolabella auricularia. It belongs to the phylum **Mollusca**.
- **Sea Lily**: Scientific name is Antidon. It belongs to the phylum **Echinodermata**.
- **C. Archin**: Scientific name is Echinus. It belongs to the phylum **Echinodermata**.

**Step 2: Group the organisms by their phyla.**
- Echinodermata: Sea Cucumber (Cucumeria), Sea Lily (Antidon), C. Archin (Echinus).
- Mollusca: Sea Hare (Dolabella auricularia).

**Step 3: Determine the odd one out.**
From the analysis, we see that:
- Three organisms (Sea Cucumber, Sea Lily, C. Archin) belong to the phylum **Echinodermata**.
- One organism (Sea Hare) belongs to the phylum **Mollusca**.

Since the Sea Hare is the only organism that does not belong to the phylum Echinodermata, it is the odd one out.

**Final Answer: Sea Hare (B)**

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