Value of osmotic potental `(pi)` and pressure potential (p) of cells a, b, c, d are given `{:("cell " , pi ,"p" ),(a,1.0,0.5),(b,0.6,0.3),(c,1.2,0.6),(d,0.8,0.4):}`
Identify the correct sequence for movement of water

Options

A. `b to c to d to a `
B. `c to b to a to d `
C. `d to c to a to b `
D. `b to d to a to c `

Answer

To determine the correct sequence for the movement of water between the cells based on their osmotic potential (π) and pressure potential (p), we need to analyze the osmotic potential values provided for each cell. Water moves from areas of higher water potential to areas of lower water potential, which corresponds to lower solute concentration.

### Step-by-Step Solution:

1. **Identify Water Potential**:
Water potential (Ψ) can be calculated using the formula:
\[ Ψ = π + p \]
where π is the osmotic potential and p is the pressure potential.

2. **Calculate Water Potential for Each Cell**:
- For Cell A:
\[ Ψ_A = π_A + p_A = 1.0 + 0.5 = 1.5 \]
- For Cell B:
\[ Ψ_B = π_B + p_B = 0.6 + 0.3 = 0.9 \]
- For Cell C:
\[ Ψ_C = π_C + p_C = 1.2 + 0.6 = 1.8 \]
- For Cell D:
\[ Ψ_D = π_D + p_D = 0.8 + 0.4 = 1.2 \]

3. **List Water Potential Values**:
- Cell A: 1.5
- Cell B: 0.9
- Cell C: 1.8
- Cell D: 1.2

4. **Determine the Sequence of Water Movement**:
Water moves from higher water potential to lower water potential. Therefore, we order the cells based on their water potential values:
- Highest: Cell C (1.8)
- Next: Cell A (1.5)
- Next: Cell D (1.2)
- Lowest: Cell B (0.9)

5. **Final Sequence**:
The correct sequence for the movement of water is:
- C → A → D → B

### Conclusion:
The correct sequence for the movement of water between the cells is **C → A → D → B**.