Go through the four statements given below
I. Root pressure provides a light push in the overall process of water transport
II. Most plants meet their water need by transpiration pull
III. The greatest contribution of root pressure may be to re-establish the continuous chains of water molecules in the xylem vessel which often break under enormous tension created by transpiration
IV. Guttation is the cause of transpiration pull The correct statement are -

Options

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

Answer

To analyze the four statements regarding water transport in plants, we will evaluate each statement one by one to determine which are correct.

### Step-by-Step Solution:

1. **Evaluate Statement I**: "Root pressure provides a light push in the overall process of water transport."
- **Analysis**: This statement is correct. Root pressure is indeed a pushing force that helps move water upwards in plants, although it is limited to a small height.

2. **Evaluate Statement II**: "Most plants meet their water need by transpiration pull."
- **Analysis**: This statement is also correct. Transpiration pull is the primary mechanism for water transport in most plants, as it creates a negative pressure that pulls water from the roots to the leaves.

3. **Evaluate Statement III**: "The greatest contribution of root pressure may be to re-establish the continuous chains of water molecules in the xylem vessel which often break under enormous tension created by transpiration."
- **Analysis**: This statement is correct as well. Root pressure helps to maintain the continuity of the water column in the xylem vessels, especially when the tension from transpiration causes breaks in the water column.

4. **Evaluate Statement IV**: "Guttation is the cause of transpiration pull."
- **Analysis**: This statement is incorrect. Guttation is the process of water loss in liquid form from the plant, which is primarily caused by root pressure, not transpiration pull. Transpiration pull is a separate process driven by water loss through stomata.

### Conclusion:
- Correct Statements: I, II, and III are correct.
- Incorrect Statement: IV is incorrect.

Thus, the correct statements are I, II, and III.