Assertion : The magnetic effects of magnet can pass through the screens of substances such as plastic, paper, glass etc.
Reason : A magnet when brought near a plastic ruler, it attracts the plastic ruler towards it.

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 explation of assertion.
C. If assertion is true but reason is false
D. If assertion is false but reason is true.

Explanation

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

### Step 1: Understand the Assertion
The assertion states that "The magnetic effects of a magnet can pass through the screens of substances such as plastic, paper, glass, etc."

- **Explanation**: This statement is true. Magnetic fields can penetrate non-magnetic materials like plastic, paper, and glass. They do not block the magnetic field; instead, the magnetic field can pass through these materials.

### Step 2: Understand the Reason
The reason states that "A magnet when brought near a plastic ruler, it attracts the plastic ruler towards it."

- **Explanation**: This statement is false. A plastic ruler is a non-magnetic material, and magnets do not attract non-magnetic materials. Therefore, a magnet will not attract a plastic ruler.

### Step 3: Conclusion
Based on the analysis:
- The assertion is true.
- The reason is false.

Thus, the correct answer to the question is: **Assertion is true and Reason is false.**

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