Assertion :- If pressure greater than atmospheric pressure is applied to pure water or solution, its water potential decreases.
Reason:- Pressure other than atmospheric pressure leads to decrease in free energy of solution

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion.
C. If assertion is true but reason is false.
D. If both assertion and reason are false

Answer

To solve the question, we need to analyze the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that if pressure greater than atmospheric pressure is applied to pure water or a solution, its water potential decreases.
- Water potential (Ψ) is defined as the potential energy of water in a system and is influenced by solute potential (Ψs) and pressure potential (Ψp). The formula is:
\[ Ψ = Ψs + Ψp \]
- When pressure is applied to pure water or a solution, it actually increases the pressure potential (Ψp), which in turn increases the overall water potential (Ψ). Therefore, the assertion is **false**.

2. **Understanding the Reason**:
- The reason states that pressure other than atmospheric pressure leads to a decrease in the free energy of the solution.
- In reality, applying pressure to a solution increases the free energy because it allows more water molecules to be available for movement. Thus, the reason is also **false**.

3. **Conclusion**:
- Since both the assertion and the reason are false, the correct answer is that both the assertion and reason are false.

### Final Answer:
Both assertion and reason are false.