Select the correct statement

Options

A. Pure water has minimum ` Psi _W`
B. Pure water has maximum ` Psi _ W`
C. Pure water has maximum D.P.D
D. Pure water has variable ` Psi_W%D.P.D `

Answer

To solve the question of selecting the correct statement regarding water potential, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Water Potential**:
- Water potential (Ψ) is a measure of the potential energy in water, which influences the movement of water in plants. It is determined by the concentration of solutes and the pressure exerted on the water.

2. **Analyzing Option 1**:
- The statement claims that "pure water has minimum water potential." This is incorrect because pure water, having no solutes, has the highest water potential (Ψ = 0). Therefore, this option is wrong.

3. **Analyzing Option 2**:
- The statement claims that "pure water has maximum water potential." This is correct, as pure water has no solute particles, leading to the highest possible water potential. Thus, this option is right.

4. **Analyzing Option 3**:
- The statement claims that "pure water has minimum diffusion pressure deficit (DPD)." This is incorrect because pure water has a DPD of zero, not minimum. Therefore, this option is wrong.

5. **Analyzing Option 4**:
- The statement claims that "pure water has variable water potential percentage of DPD." This is also incorrect because pure water has a constant water potential of zero and does not vary. Thus, this option is wrong.

6. **Conclusion**:
- After analyzing all the options, the correct statement is that "pure water has maximum water potential."

### Final Answer:
- The correct statement is: **Option 2: Pure water has maximum water potential.**