In the vascular bundle of leaf, xylem is located towards the adaxial side of the leaf.

Answer

### Step-by-Step Solution:

1. **Understanding Vascular Bundles**:
- Vascular bundles are structures in plants that consist of xylem and phloem. They are responsible for the transportation of water, nutrients, and food throughout the plant.

2. **Identifying the Components**:
- Xylem is responsible for transporting water and minerals from the roots to the leaves.
- Phloem transports the products of photosynthesis (mainly sugars) from the leaves to other parts of the plant.

3. **Location of Xylem and Phloem in Leaves**:
- In a transverse section (TS) of a leaf, the xylem is located towards the adaxial side (the upper side) of the leaf, while the phloem is located towards the abaxial side (the lower side).

4. **Understanding Adaxial and Abaxial**:
- The adaxial side refers to the upper surface of the leaf, which is typically exposed to sunlight.
- The abaxial side refers to the lower surface of the leaf, which is usually shaded and has stomata for gas exchange.

5. **Conclusion**:
- Therefore, the statement that "in the vascular bundle of the leaf, xylem is located towards the adaxial side of the leaf" is true.