Which of the following is bilateral symmetrical during larval stage and radially symmetrical during adult stage ?

Options

A. Cuttle fish
B. Starfish
C. Jellyfish
D. Silver fish

Answer

To solve the question of which organism exhibits bilateral symmetry during its larval stage and radial symmetry during its adult stage, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Symmetry Types**:
- Bilateral symmetry means the organism can be divided into two identical halves along one plane.
- Radial symmetry means the organism can be divided into similar halves around a central axis.

2. **Identify the Organisms**:
- The options given are cuttlefish, starfish, jellyfish, and silverfish.

3. **Analyze Each Option**:
- **Cuttlefish**: This organism is a cephalopod and exhibits bilateral symmetry throughout its life.
- **Starfish**: This organism is an echinoderm. Starfish are bilaterally symmetrical in their larval stage and become radially symmetrical as adults.
- **Jellyfish**: Jellyfish exhibit radial symmetry throughout their life cycle.
- **Silverfish**: This organism is an insect and exhibits bilateral symmetry throughout its life.

4. **Conclusion**:
- The only organism that is bilateral symmetrical during the larval stage and radially symmetrical during the adult stage is the **starfish**.

### Final Answer:
**Starfish**

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