The larvae of sea stars are

Options

A. Trocophore and auricularia
B. Bipinnria and brachiolaria
C. Redia and cercaria
D. Miracidium & cysticercus

Answer

To answer the question about the larvae of sea stars (C star), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Recognize that sea stars belong to the phylum Echinodermata and the class Asteroidea.

2. **Understand Larval Forms**: Research the types of larvae associated with sea stars. The common larval forms in Echinodermata include:
- Trochophore (found in Mollusca and Annelida)
- Auricularia (found in Holothuroidea, another class of Echinodermata)
- Bipinnaria and Brachylaria (specifically found in Asteroidea)

3. **Eliminate Incorrect Options**:
- Trochophore is not related to sea stars; it is specific to Mollusca and Annelida.
- Auricularia is related to Holothuroidea, not directly to Asteroidea.
- Radia and Sarcaria are larvae of liver flukes, which belong to Platyhelminthes, and are not relevant to sea stars.
- Miracidium and Cysticercus are also larvae of liver flukes and do not pertain to sea stars.

4. **Identify the Correct Larvae**: The larvae that are specifically associated with sea stars (Asteroidea) are Bipinnaria and Brachylaria.

5. **Conclusion**: Therefore, the correct answer to the question is that the larvae of sea stars are Bipinnaria and Brachylaria.

### Final Answer:
The larvae of sea stars are Bipinnaria and Brachylaria.

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