Assertion (A): Earth has day and night.
Reason (R): Earth revolves around the Sun.

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A Both Assertion (A) and Reason (R) are true, and R is the correct explanation of A.
B Both Assertion (A) and Reason (R) are true, but R is NOT the correct explanation of A.
C Assertion (A) is true, but Reason (R) is false
D Assertion (A) is false, but Reason (R) is true.

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Answer: B. Both Assertion (A) and Reason (R) are true, but R is NOT the correct explanation of A.

Both statements are true, but day and night are caused by the Earth's rotation on its axis, not its revolution around the Sun. So R is not the correct explanation of A.

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Assertion (A): Earth has day and night. Reason (R): Earth revolves around the Sun.

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Assertion (A): Earth has day and night.
Reason (R): Earth revolves around the Sun.