[A]: The water is absorbed by the root and moves into the stem.
[R]: From root hair cell, water directly moves to xylem cells

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

### Step-by-Step Solution:

1. **Understanding Water Absorption**:
- Water is absorbed by the roots of the plant. This process occurs primarily through root hair cells, which have a large surface area and are permeable to water.

2. **Movement of Water**:
- Once absorbed, water moves from the root hair cells into the root cortex and eventually reaches the xylem vessels. The xylem is responsible for transporting water and minerals from the roots to the aerial parts of the plant, such as the stem and leaves.

3. **Role of Xylem**:
- The xylem cells are specialized for conducting water. They have a structure that allows for efficient transport, including features like hollow tubes and the presence of lignin that strengthens the cell walls.

4. **Water Potential Gradient**:
- The movement of water from the roots to the xylem is driven by a water potential gradient. Water moves from areas of higher water potential (in the roots) to areas of lower water potential (in the xylem and aerial parts of the plant).

5. **Conclusion**:
- Therefore, the statement [A] is true: "The water is absorbed by the root and moves into the stem." However, the explanation [R] is partially correct; while water does move from root hair cells to xylem cells, the driving force is the water potential gradient, not just direct movement.