Some structures with their function are given below, mark the wrongly matched one.

Options

A. Choanocytes - Generation of water current
B. Pneumatic bones - Skeletal support
C. Radula - feeding
D. Statocyst - Balance organs

Answer

To solve the question, we need to analyze the structures and their corresponding functions to identify the wrongly matched pair. Here’s the step-by-step solution:

### Step 1: Analyze the First Option
- **Structure:** Quinocides
- **Function:** Generation of water current
- **Analysis:** Quinocides are indeed responsible for filtering particles out of the water, which involves the generation of water currents.
- **Conclusion:** This match is correct.

### Step 2: Analyze the Second Option
- **Structure:** Pneumatic bones
- **Function:** Provide skeletal support
- **Analysis:** Pneumatic bones are also known as hollow bones. They contain air-filled spaces that reduce weight without sacrificing strength, which does not primarily serve the function of providing skeletal support.
- **Conclusion:** This match is incorrect.

### Step 3: Analyze the Third Option
- **Structure:** Radula
- **Function:** Feeding
- **Analysis:** The radula is a specialized feeding organ found in mollusks. It is used for scraping food particles off surfaces, which is essential for both herbivorous and carnivorous species.
- **Conclusion:** This match is correct.

### Step 4: Analyze the Fourth Option
- **Structure:** Stratocyst
- **Function:** Balance organ
- **Analysis:** Stratocysts are sensory structures that help maintain balance and orientation in aquatic invertebrates.
- **Conclusion:** This match is correct.

### Final Conclusion
After analyzing all the options, the wrongly matched pair is:
- **Option 2:** Pneumatic bones and their function of providing skeletal support.