Which of the following statement(s) is/are correct?
I. Radial vascular bundles are commonly found in stems.
II. Conjoint vascular bundles are found in roots.
III. Radial vascular bundles are commonly found in roots.
IV. Conjoint vascular bundles are found in stems and leaves.
1 II and III
2 I, II and III
3 III and IV
4 I and II

Options

A. II and III
B. I, II and III
C. III and IV
D. I and II

Answer

To determine which of the statements regarding vascular bundles is correct, let's analyze each statement step by step.

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**:
- Vascular bundles are composed of xylem and phloem, which are responsible for transporting water and nutrients in plants.

2. **Identifying Types of Vascular Bundles**:
- Vascular bundles can be categorized into two types based on the arrangement of xylem and phloem:
- **Radial Vascular Bundles**: Xylem and phloem are located at different radii.
- **Conjoint Vascular Bundles**: Xylem and phloem are located together.

3. **Analyzing Each Statement**:
- **Statement I**: "Radial vascular bundles are commonly found in stems."
- This statement is **incorrect**. Radial vascular bundles are typically found in roots, not in stems.

- **Statement II**: "Conjoint vascular bundles are found in roots."
- This statement is **incorrect**. Conjoint vascular bundles are primarily found in stems and leaves.

- **Statement III**: "Radial vascular bundles are commonly found in roots."
- This statement is **correct**. Radial vascular bundles are indeed found in roots.

- **Statement IV**: "Conjoint vascular bundles are found in stems and leaves."
- This statement is **correct**. Conjoint vascular bundles are found in both stems and leaves.

4. **Conclusion**:
- The correct statements are III and IV. Therefore, the answer is option **3 (III and IV)**.