A: PMMA is used for making lenser and light cover.
R:It has excellent light transmission properties.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark 1.
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark 2.
C. If Assertion is true statement but Reason is false, then mark 3.
D. If both Assertion and Reason are false statements the mark 4.

Answer

To solve the question, we need to evaluate the assertion (A) and the reason (R) provided:

**Assertion (A):** PMMA is used for making lenses and light covers.
**Reason (R):** It has excellent light transmission properties.

### Step-by-Step Solution:

1. **Understanding PMMA:**
- PMMA stands for polymethylmethacrylate, which is a synthetic polymer.
- It is commonly known for its applications in making lenses and light covers due to its properties.

2. **Properties of PMMA:**
- PMMA is known for its excellent light transmission properties, which means it allows a significant amount of light to pass through it.
- This property makes it a suitable alternative to glass in various applications, including lenses and light covers.

3. **Evaluating the Assertion:**
- The assertion states that PMMA is used for making lenses and light covers. This is true, as PMMA is widely used in these applications due to its favorable characteristics.

4. **Evaluating the Reason:**
- The reason states that PMMA has excellent light transmission properties. This is also true and is a key reason why PMMA is used for lenses and light covers.

5. **Conclusion:**
- Both the assertion and the reason are correct.
- The reason provided correctly explains why PMMA is used for the applications mentioned in the assertion.

### Final Answer:
Both the assertion (A) and the reason (R) are correct, and the reason is a correct explanation of the assertion.