The sense organs like eyes , statocysts , and osphradia are present in

Options

A. porifera
B. Arthropods
C. Mollusca
D. Chordata

Answer

To solve the question regarding the presence of sense organs like eyes, statocysts, and osphradia, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Sense Organs**:
- **Eyes**: Organs that provide vision.
- **Statocysts**: Organs responsible for balance and orientation, typically found in aquatic invertebrates.
- **Osphradia**: Olfactory organs associated with the respiratory system, primarily found in mollusks.

2. **Analyze the Options**:
- **Option 1: Porifera**: These organisms (sponges) lack true tissues and organs, including sense organs.
- **Option 2: Arthropods**: While they have eyes, they do not possess statocysts or osphradia in the same context as mollusks.
- **Option 3: Mollusca**: This group includes organisms like snails and octopuses, which have well-developed eyes, statocysts for balance, and osphradia for detecting chemicals in water.
- **Option 4: Chordata**: This group includes vertebrates, which have eyes but do not typically have statocysts or osphradia.

3. **Identify the Correct Group**:
- Based on the presence of all three sense organs (eyes, statocysts, and osphradia), the correct answer is **Mollusca**. This group is known for having these specific sensory structures.

4. **Conclusion**:
- Therefore, the sense organs like eyes, statocysts, and osphradia are present in **Mollusca**.

### Final Answer:
**Option 3: Mollusca**