Keber's organ is found in

Options

A. Sepia
B. Octopus
C. Pila
D. Unio

Explanation

**Step-by-Step Solution:**

1. **Understanding Keber's Organ**: Keber's organ, also known as the organ of Bojanus, is recognized as an excretory structure in certain mollusks. It functions similarly to a pericardial gland and is involved in the removal of waste materials from the organism.

2. **Identifying the Organism**: Keber's organ is specifically found in the organism known as "Union," which belongs to the class Bivalvia (bivalves).

3. **Examining Other Options**:
- **Option A: Sepia**: In Sepia (cuttlefish), the excretory organ is a renal sac, not Keber's organ. Therefore, this option is incorrect.
- **Option B: Octopus**: Similarly, in Octopus, the excretory structure is also a renal sac. Thus, this option is incorrect as well.
- **Option C: Pila**: In Pila (a type of gastropod), the excretory structure is a kidney, making this option incorrect too.
- **Option D: Union**: This is the correct option, as Keber's organ is indeed present in Union, serving as an excretory gland.

4. **Conclusion**: The correct answer to the question "Keber's organ is found in" is **Union**.

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