Passage of water through a semipermeable membrane causes
(a) Suction pressure
(b) Osmotic pressure
(c) Turgor pressure
(d) Wall Pressure

Options

A. Suction pressure
B. Osmotic pressure
C. Turgor pressure
D. Wall Pressure

Answer

To solve the question regarding the passage of water through a semipermeable membrane and its effects, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks what happens when water passes through a semipermeable membrane. We need to identify the correct type of pressure that results from this process.

2. **Analyzing Option (a) - Suction Pressure**:
- Suction pressure occurs when a fluid is removed from a particular area, causing fluid to rush in from surrounding areas to balance the pressure.
- **Conclusion**: This pressure is not directly related to the passage of water through a semipermeable membrane. Therefore, this option is incorrect.

3. **Analyzing Option (b) - Osmotic Pressure**:
- Osmotic pressure is the pressure required to prevent the flow of water across a semipermeable membrane. It drives water movement from a region of lower solute concentration to a region of higher solute concentration.
- **Conclusion**: While osmotic pressure is related to water movement, it does not describe the pressure caused by the passage of water itself. Thus, this option is also incorrect.

4. **Analyzing Option (c) - Turgor Pressure**:
- Turgor pressure is the pressure exerted by the fluid (water) inside the central vacuole of a plant cell against the cell wall. This pressure increases when water enters the cell through osmosis, causing the cell to swell and become turgid.
- **Conclusion**: This pressure is directly caused by the passage of water through a semipermeable membrane into the cell. Therefore, this option is correct.

5. **Analyzing Option (d) - Wall Pressure**:
- Wall pressure is the pressure exerted by the cell wall against the turgor pressure. It acts in the opposite direction to turgor pressure and helps maintain the structure of the cell.
- **Conclusion**: This pressure does not result from the passage of water through the membrane but rather counteracts turgor pressure. Hence, this option is incorrect.

### Final Answer:
The correct answer is **(c) Turgor pressure**.

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