Select an correct statement for osmotic potential

Options

A. Osmotic pressure is the positive pressure applied
B. Osmotic potential is negative
C. Numerically osmotic pressure is equivalent to the osmotic potential, but the sign is opposite.
D. All are correct

Answer

### Step-by-Step Solution:

1. **Understanding Osmotic Pressure and Osmotic Potential**:
- Osmotic pressure is defined as the pressure required to prevent water from diffusing across a semipermeable membrane. It is a positive value because it represents the force needed to stop the flow of water.

2. **Understanding Osmotic Potential**:
- Osmotic potential, on the other hand, is a measure of the potential energy of water in a solution due to solute concentration. It is always negative because it indicates the tendency of water to move into a solution.

3. **Analyzing the Statements**:
- **Statement 1**: "Osmotic pressure is the positive pressure applied to osmotic pressure." This statement is correct because osmotic pressure is indeed a positive value.
- **Statement 2**: "Osmotic potential is negative." This statement is also correct, as osmotic potential is defined to be negative.
- **Statement 3**: "Numerically, osmotic pressure is equivalent to osmotic potential by the sine opposite." This is correct as well because the osmotic potential is the negative of osmotic pressure (Osmotic potential = -Osmotic pressure).

4. **Conclusion**:
- Since all statements regarding osmotic pressure and osmotic potential are correct, the correct answer is that all options are valid.

5. **Final Answer**:
- The correct option is **Option 4: All are correct**.