Assertion : All the particles between two consecutive nodes vibrates in the same phase.
Reason : Particles on two sides of a node vibrate mutually in opposite phase.

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Assertion is correct but reason is incorrect

Both Assertion and Reason are correct but Reason is not the correct explanation ofassertion

Reason is correct but Assertion is incorrect

Both Assertion and Reason are correct and Reason is the correct explanation ofAssertion

answer is B.

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Detailed Solution

The region between the nodes all go to mean position together and to their respective maximum together. Hence, phase difference is zero or they vibrate in same phase.

The particles in opposite side of nodes moves in opposite direction hence they are in opposite phase.

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