A: Modulator is an essential component of a transmitter.
R: Modulator superimposes a low frequency message signal on a high frequency carrier wave.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1)
B. If both Assertin & 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, then mark (4)

Answer

To solve the assertion and reason question, we need to analyze both statements carefully.

### Step-by-Step Solution:

1. **Understand the Assertion (A)**:
- The assertion states that "Modulator is an essential component of a transmitter."
- This is true because a modulator is necessary for the transmission of information in communication systems. It prepares the message signal for transmission by modifying it to a suitable form.

2. **Understand the Reason (R)**:
- The reason states that "Modulator superimposes a low frequency message signal on a high frequency carrier wave."
- This is also true. The primary function of a modulator is to take a low-frequency message signal (like audio) and combine it with a high-frequency carrier wave (like radio waves) to facilitate effective transmission over long distances.

3. **Evaluate the Relationship**:
- While both the assertion and reason are true, we need to determine if the reason correctly explains the assertion.
- The assertion is about the importance of the modulator in a transmitter, while the reason describes how the modulator functions. The reason does not provide a direct explanation for why the modulator is essential; it merely describes its operation.

4. **Conclusion**:
- Since both the assertion and reason are true, but the reason does not explain the assertion, we conclude that the correct answer is: "Both assertion and reason are true, but the reason is not the correct explanation of the assertion."

### Final Answer:
- **Option B**: Both assertion and reason are true, but the reason is not the correct explanation of the assertion.