In______vascular bundle, a strip of vascular cambium is present in between the xylem and phloem.

Options

A. open
B. closed
C. endarch
D. exarch

Explanation

**Step-by-Step Solution:**

1. **Understanding Vascular Bundles**: Vascular bundles are structures in plants that contain xylem and phloem, which are responsible for the transport of water, nutrients, and food.

2. **Identifying Types of Vascular Bundles**: There are two main types of vascular bundles: open and closed. Open vascular bundles have a strip of vascular cambium present between the xylem and phloem, while closed vascular bundles do not have this cambium.

3. **Defining Vascular Cambium**: Vascular cambium is a type of meristematic tissue that is responsible for the secondary growth in plants. It allows for the formation of new xylem and phloem cells.

4. **Analyzing the Options**:
- **Open Vascular Bundle**: Contains vascular cambium between xylem and phloem.
- **Closed Vascular Bundle**: Lacks vascular cambium between xylem and phloem.
- **Endarch and Exarch**: These terms refer to the arrangement of protoxylem and metaxylem, not the presence of cambium.

5. **Conclusion**: Since the question specifically asks for the type of vascular bundle that contains a strip of vascular cambium between xylem and phloem, the correct answer is the open vascular bundle.

**Final Answer**: In open vascular bundles, a strip of vascular cambium is present between the xylem and phloem.

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