Organ of Bojanus are found in :-

Options

A. Chordata
B. Echinodermata
C. Annelida
D. Mollusca

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the location of the "Organ of Bojanus." This organ is associated with a specific group of animals.

2. **Identifying the Organ of Bojanus**: The Organ of Bojanus is known to function as an excretory organ in certain mollusks. It serves a similar purpose to kidneys in other animals, helping to remove waste materials from the body.

3. **Analyzing the Options**:
- **Option 1: Caudata**: This group includes amphibians and reptiles, which have a urinary system that is different from the Organ of Bojanus. Therefore, this option is incorrect.
- **Option 2: Echinodermata**: Echinoderms, such as starfish and sea urchins, have a simple excretory system and do not possess kidneys or the Organ of Bojanus. Thus, this option is also incorrect.
- **Option 3: Annelida**: Annelids, which include earthworms and leeches, have nephridia as their excretory organs. They do not have the Organ of Bojanus, making this option incorrect as well.
- **Option 4: Mollusca**: Mollusks, which include snails, clams, and squids, are known to possess the Organ of Bojanus. This is the correct option.

4. **Conclusion**: Based on the analysis, the Organ of Bojanus is found in **Mollusca**.

**Final Answer**: The Organ of Bojanus is found in **Mollusca**.

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