A : Long distance radio broadcasts use short-wave bands.
R : Ionosphere reflectes waves in these bands.

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, then mark (4)

Answer

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

**Assertion (A):** Long distance radio broadcasts use short-wave bands.
**Reason (R):** Ionosphere reflects waves in these bands.

### Step-by-Step Solution:

1. **Understanding the Assertion (A):**
- Long distance radio broadcasts utilize short-wave bands. This is a fact based on the characteristics of radio wave propagation. Short-wave bands have frequencies typically ranging from 3 to 30 MHz.

2. **Understanding the Reason (R):**
- The reason states that the ionosphere reflects waves in these bands. The ionosphere is a layer of the Earth's atmosphere that is ionized by solar and cosmic radiation. It can reflect certain frequencies of radio waves, particularly short-wave frequencies, back to the Earth.

3. **Linking Assertion and Reason:**
- The assertion is true because short-wave bands are indeed used for long-distance communication. The reason is also true because the ionosphere can reflect these short-wave signals, allowing them to travel over long distances by bouncing off the ionosphere and back to the ground.

4. **Conclusion:**
- Since both the assertion and the reason are true, and the reason correctly explains why the assertion is true, we can conclude that the statement is correct.

### Final Answer:
Both the assertion (A) and the reason (R) are true, and R correctly explains A.

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