Match and find the correct option
`{:((a), "Water potential",(i),"It is usually postive"),((b),"Solute potential", (ii), "It is zero for pure water"),((c),"Pressure potential",(iii), "It is always negative " ):}`

Options

A. a- ii, b-iii, c-I
B. a-`i`, b-iii, c-ii
C. a-iii, b-ii, c-i
D. a-ii, b- `i`, c-iii

Answer

To solve the matching question regarding water potential, solute potential, and pressure potential, we will analyze each term and match it with the correct description.

### Step-by-Step Solution:

1. **Understanding Water Potential (A)**:
- Water potential (Ψw) is the potential energy of water per unit volume relative to pure water.
- For pure water, the water potential is defined as zero (Ψw = 0).
- Therefore, the correct match is:
- **Water potential (A)** → **(ii) It is zero for pure water**.

2. **Understanding Solute Potential (B)**:
- Solute potential (Ψs) is the potential of water to move in response to solute concentration.
- When solute is added to pure water, the solute potential becomes negative because the addition of solute reduces the water potential.
- Thus, the correct match is:
- **Solute potential (B)** → **(iii) It is always negative**.

3. **Understanding Pressure Potential (C)**:
- Pressure potential (Ψp) is the pressure exerted by the cell wall against the protoplast (the living part of the cell).
- This pressure is usually positive, as it pushes water into the cell, but can be negative in some cases (e.g., in certain plant cells under tension).
- Therefore, the correct match is:
- **Pressure potential (C)** → **(i) It is usually positive**.

### Final Matching:
- (A) Water potential → (ii) It is zero for pure water.
- (B) Solute potential → (iii) It is always negative.
- (C) Pressure potential → (i) It is usually positive.

### Summary of Matches:
- A → ii
- B → iii
- C → i