Assertion (A): The stars twinkle while the planets do not.
Reason (R): The stars are much bigger in size than the planets.

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Both A and R true, and R is correct explanation of A

Both A and R are true but R is NOT the correct explanation of A

A is true but R is false

A is false but R is true

answer is B.

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Detailed Solution

The stars twinkle while the planets do not. It is due to variation in density of atmospheric layer. As the stars are very far and giving light continuously to us. So, the light coming from stars is found to change their intensity continuously. Hence they are seen twinkling. Also stars are much bigger in size than planets but it has nothing to deal with twinkling phenomenon.

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