In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): Colloidal solutions do not show Brownian motion.
Reason (R): Brownian motion is responsible for stability of sols.

Options

A. Both A and Rare true and R is the correct explanation of A
B. Both A and R are true but explanation of A
C. A is true but R is false
D. A is false and R is True

Explanation

To solve the question, we need to analyze both the Assertion (A) and the Reason (R) provided.

### Step 1: Analyze the Assertion (A)
- **Assertion (A)** states: "Colloidal solutions do not show Brownian motion."
- This statement is **false**. Colloidal solutions do indeed show Brownian motion, which is the random zigzag movement of colloidal particles due to collisions with molecules of the dispersion medium.

### Step 2: Analyze the Reason (R)
- **Reason (R)** states: "Brownian motion is responsible for the stability of sols."
- This statement is **true**. Brownian motion helps prevent the settling of colloidal particles under the influence of gravity, thereby contributing to the stability of colloidal solutions (sols).

### Step 3: Conclusion
- Since the Assertion (A) is false and the Reason (R) is true, the correct choice is that the Assertion is false and the Reason is true.

### Final Answer
The correct choice is: Assertion is false and Reason is true.

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