Largest group of mollusca is

Options

A. Pelecypods
B. Gastropods
C. Cephalopods
D. Polyplacophora

Answer

**Step-by-Step Solution:**

1. **Understanding the Phylum Mollusca**:
- Mollusca is a diverse group of invertebrates that includes various classes of animals. It is the second largest phylum in the animal kingdom.

2. **Identifying the Classes within Mollusca**:
- The phylum Mollusca is divided into several classes, including:
- Bivalvia (or Pelecypoda)
- Gastropoda
- Cephalopoda
- Polyplacophora

3. **Determining the Largest Group**:
- Among these classes, the largest group is identified as Gastropoda.

4. **Understanding the Significance of Gastropoda**:
- Gastropoda comprises approximately 80% of all molluscan species. This indicates that the majority of mollusks belong to this class.

5. **Examples of Gastropoda**:
- Common examples of Gastropoda include snails and slugs, with the apple snail being a notable member.

6. **Conclusion**:
- Therefore, the largest group of Mollusca is **Gastropoda**.

---