Glochidium and Veliger both are the larval formsof

Options

A. Pila
B. Nereis
C. Asterias
D. Bivalves

Answer

To solve the question regarding the larval forms Glochidium and Veliger, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Glochidium**:
- Glochidium is a larval form that is specifically associated with freshwater bivalves, particularly mussels. It is a microscopic larval stage that is adapted to a parasitic lifestyle on fish gills.

2. **Identify Veliger**:
- Veliger is another larval form that occurs in marine mollusks, including bivalves and gastropods. It is typically a free-swimming larval stage that develops from the trochophore larva and is found in various aquatic environments.

3. **Determine Commonality**:
- Both Glochidium and Veliger are larval forms of bivalves. Bivalves are a class of mollusks that include clams, oysters, and mussels.

4. **Conclusion**:
- Since both Glochidium and Veliger are larval forms found in bivalves, the correct answer to the question is option D: Bivalves.

### Final Answer:
Glochidium and Veliger are both larval forms of **Bivalves** (Option D).

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