A : Static crashes are heard on a radio when a lightening flash occurs.
R : Light and radiowaves are EM waves and they interfere.

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 both the assertion (A) and the reason (R) provided.

### Step 1: Understand the Assertion (A)
The assertion states that static crashes are heard on a radio when a lightning flash occurs. This is true because lightning produces a significant amount of electromagnetic radiation, which can interfere with radio signals.

### Step 2: Understand the Reason (R)
The reason states that light and radio waves are electromagnetic (EM) waves and they interfere. This is also true. Both light and radio waves are part of the electromagnetic spectrum and can indeed interfere with each other.

### Step 3: Analyze the Relationship Between A and R
Now we need to determine if the reason (R) explains the assertion (A). Since the assertion is about the interference caused by lightning (which produces EM waves) affecting radio signals, and the reason explains that both light and radio waves are EM waves that can interfere, we can conclude that the reason does explain the assertion.

### Step 4: Conclusion
Both the assertion and the reason are correct, and the reason provides an explanation for the assertion. Therefore, the answer to the question is that both the assertion and reason are correct, and the reason explains the assertion.

### Final Answer
The correct option is: "Both A and R are correct, and R explains A."

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