When a few typical solutes are separated by a particular selective membrane such as protein particles, blood corpuscles, this process is called:

Options

A. Transpiration
B. Endosmosis
C. Dialysis
D. Diffusion

Answer

To solve the question regarding the process of separating solutes by a selective membrane, we will analyze each option provided and determine which one fits the description best.

### Step-by-Step Solution:

1. **Understanding the Question**:
The question asks about a process where solutes are separated by a selective membrane, such as protein particles or blood corpuscles.

2. **Analyzing Option 1: Transpiration**:
- **Definition**: Transpiration refers to the loss of water vapor from plant leaves.
- **Relevance**: This process does not involve the separation of solutes through a selective membrane.
- **Conclusion**: This option is not correct.

3. **Analyzing Option 2: Endosmosis**:
- **Definition**: Endosmosis is the process where solvent molecules move into a cell placed in a hypotonic solution, causing the cell to swell.
- **Relevance**: This process does not involve a selective membrane for separating solutes.
- **Conclusion**: This option is not correct.

4. **Analyzing Option 3: Dialysis**:
- **Definition**: Dialysis is the process of separating particles of colloids from those of crystalloids by diffusion through a permeable membrane.
- **Relevance**: In dialysis, a selective membrane is used to separate solutes based on their size, which aligns with the question's description.
- **Conclusion**: This option is correct.

5. **Analyzing Option 4: Diffusion**:
- **Definition**: Diffusion is the movement of substances from an area of high concentration to an area of low concentration.
- **Relevance**: This process does not specifically involve a selective membrane for separating solutes.
- **Conclusion**: This option is not correct.

6. **Final Answer**:
Based on the analysis, the correct answer to the question is **Option 3: Dialysis**.