Assertion (A) When solution is separted from the pure solved semipermeable membrane, the solvent molecules pass through it from pure solvent side to the solution side.
Reason (R ) Diffusion solvent occurs from a region of concentration solution to a region of low concentration soluton.

Options

A. Assertion and reason both are correct statements and reason is correcft explanation for assertion.
B. Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C. Assertion is correct statement but reason is wrong statement.
D. Assertion and reason both are incorrect statements.

Explanation

To solve the given question, we will analyze both the assertion (A) and the reason (R) step by step.

### Step 1: Understanding the Assertion (A)
The assertion states: "When a solution is separated from the pure solvent by a semipermeable membrane, the solvent molecules pass through it from the pure solvent side to the solution side."

**Explanation:**
- A semipermeable membrane allows only certain molecules to pass through it, typically solvent molecules in the case of solutions.
- In osmosis, solvent molecules move from an area of lower solute concentration (pure solvent) to an area of higher solute concentration (the solution) in order to equalize the concentration on both sides of the membrane.

### Step 2: Understanding the Reason (R)
The reason states: "Diffusion of solvent occurs from a region of concentration solution to a region of low concentration solution."

**Explanation:**
- This statement is misleading. While diffusion does involve movement from areas of higher concentration to areas of lower concentration, in the context of osmosis, it specifically refers to the movement of solvent molecules from a region of low solute concentration to a region of high solute concentration.
- Therefore, the reason does not correctly explain the assertion.

### Step 3: Conclusion
Based on the analysis:
- The assertion is correct because it accurately describes the process of osmosis.
- The reason is incorrect as it misrepresents the direction of solvent movement in osmosis.

### Final Answer
Thus, the correct option is: **Assertion is correct, but Reason is incorrect.**

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