Assertion :- Plamolysis occurs in hypertonic solution.
Reason:- In hypertonic solution, value of free energy is comparatively more negative than cell 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 analyze the assertion and reason provided in the question, we will break down the concepts of plasmolysis and hypertonic solutions step by step.

### Step 1: Understanding Plasmolysis
Plasmolysis is a process that occurs in plant cells when they lose water due to osmosis. This typically happens when a plant cell is placed in a hypertonic solution, which has a higher concentration of solutes compared to the cell's interior.

**Hint:** Recall that plasmolysis is related to the movement of water out of the cell.

### Step 2: Identifying Hypertonic Solutions
A hypertonic solution is one where the concentration of solutes outside the cell is greater than that inside the cell. As a result, water moves out of the cell to balance the solute concentrations, leading to the contraction of the protoplast (the living part of the cell) away from the cell wall.

**Hint:** Remember that in a hypertonic environment, water moves from an area of lower solute concentration to an area of higher solute concentration.

### Step 3: Analyzing the Assertion
The assertion states that "Plasmolysis occurs in hypertonic solution." This is true because when plant cells are placed in hypertonic solutions, they lose water, causing the protoplast to shrink and pull away from the cell wall.

**Hint:** Think about what happens to plant cells when they are exposed to saltwater or sugar solutions.

### Step 4: Evaluating the Reason
The reason given is that "In hypertonic solution, the value of free energy is comparatively more negative than cell solution." This statement is also true. In a hypertonic solution, the free energy of water is lower (more negative) outside the cell compared to inside. This difference in free energy drives the movement of water out of the cell.

**Hint:** Free energy concepts relate to the tendency of water to move from areas of higher free energy to lower free energy.

### Step 5: Conclusion
Both the assertion and the reason are true. However, the reason provided does not directly explain why plasmolysis occurs; it merely describes the conditions under which it happens. Therefore, while both statements are correct, the reason is not the correct explanation for the assertion.

### Final Answer
- **Assertion:** True
- **Reason:** True, but not the correct explanation for the assertion.

### Options Analysis
1. Both assertion and reason are true, and reason is the correct explanation of assertion. (Incorrect)
2. Both assertion and reason are true, but reason is not the correct explanation of assertion. (Correct)
3. Assertion is true and reason is false. (Incorrect)
4. Both assertion and reason are false. (Incorrect)

**Correct Option:** 2