Which one of the following is not a part of stele ?

Options

A. Pith
B. Vascular bundle
C. Endodermis
D. Pericycle

Answer

To solve the question "Which one of the following is not a part of stele?" we need to understand the components of the stele in vascular plants.

### Step-by-Step Solution:

1. **Define Stele**: The stele is the central part of the root or stem in vascular plants. It contains the vascular tissues derived from the procambium.

2. **Identify Components of Stele**: The main components of the stele include:
- **Vascular Tissues**: These are primarily xylem and phloem, which are responsible for the transport of water, nutrients, and food.
- **Vascular Bundles**: These are arrangements of xylem and phloem that form the vascular system.
- **Pericycle**: This is a layer of cells that can be found just inside the endodermis and surrounds the vascular tissues.

3. **Analyze the Options**:
- **Pith**: This is a type of ground tissue found in the center of stems and is part of the stele.
- **Vascular**: This refers to the vascular tissues (xylem and phloem) which are indeed part of the stele.
- **Bunda**: This seems to be a typographical error; it might refer to "bundles" which are part of the stele.
- **Endodermis**: This is the innermost layer of the cortex and is not part of the stele.
- **Pericycle**: This is part of the stele as it surrounds the vascular tissues.

4. **Conclusion**: The only option that is not part of the stele is the **endodermis**.

### Final Answer:
The correct answer is **endodermis**.