Connecting link between Annelida and Mollusca is

Options

A. Peripatus
B. Lepidosiren
C. Neopilina
D. Protopterus

Explanation

To determine the connecting link between Annelida and Mollusca, we need to analyze the characteristics of the organisms involved.

### Step-by-Step Solution:

1. **Understanding the Groups**:
- Annelida includes segmented worms like earthworms and leeches.
- Mollusca includes diverse organisms such as snails, clams, and octopuses.

2. **Identifying the Connecting Link**:
- The question asks for a connecting link, which is an organism that exhibits characteristics of both Annelida and Mollusca.

3. **Reviewing the Options**:
- The options provided are not listed here, but we focus on identifying the organism that fits the criteria.

4. **Recognizing Neoplina**:
- Neoplina is a genus that is often cited as a connecting link between Annelida and Mollusca.

5. **Characteristics of Neoplina**:
- **Trochophore Larvae**: Neoplina has trochophore larvae, which is a characteristic shared with Annelids.
- **Body Structure**: It has a shell and mantle similar to Mollusca.
- **Muscular Foot**: Neoplina possesses a flat muscular foot, which is a characteristic of Mollusca.
- **Nephridia and Other Structures**: It contains nephridia and other anatomical features that resemble both groups.

6. **Conclusion**:
- Based on the shared characteristics, Neoplina is identified as the connecting link between Annelida and Mollusca.

### Final Answer:
The connecting link between Annelida and Mollusca is **Neoplina**.

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