Which of the following is an incorrect match?

Options

A. Radula- Feeding
B. Ctenidia-Respiration
C. Organ of Bojanus-Excreation
D. Keber's organ Pearl formation

Answer

To determine which of the following options is an incorrect match related to Phylum Mollusca, we will analyze each option provided.

1. **Identify the characteristics of Phylum Mollusca**:
- Phylum Mollusca is known for its diverse organisms, which typically have a soft body covered by a calcareous shell.
- They possess a muscular foot, a visceral mass, and a head.
- A unique feature of mollusks is the presence of a radula, a rasping organ used for feeding.

2. **Analyze the options**:
- **Option A**: Describes a characteristic of mollusks that is correct.
- **Option B**: States that tinnidia (gills) are used for respiration in mollusks, which is also correct.
- **Option C**: Refers to the organ of Bojanus as an excretory organ. This is correct as Bojanus is indeed involved in excretion in mollusks.
- **Option D**: Claims that Kebber's organ is involved in pearl formation. However, Kebber's organ (or pericardial gland) is primarily an excretory organ and does not play a role in pearl formation.

3. **Conclusion**:
- After analyzing all the options, we find that **Option D** is the incorrect match because Kebber's organ does not function in pearl formation but is an excretory organ.

### Summary of the Solution:
- The incorrect match among the options provided is **Option D**, as Kebber's organ is not involved in pearl formation.