Assertion - In a sound wave, a displacement node is a pressure antinode and vice versa.
Reason - Displacement node is point of minimum displacement.

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

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

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
At the point where a compression and a rarefaction meet, the displacement is minimum and it is called displacement node. at this point, the pressure difference is maximum antinode. On the other hand, at the mid-point of compression or a rarefaction, the displacement variation is maximum. Such a point is displacement antinode. However such a point is pressure node, as pressure variation is minimum at such a point.

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Assertion - In a sound wave, a displacement node is a pressure antinode and vice versa.Reason - Displacement node is point of minimum displacement.

Assertion - In a sound wave, a displacement node is a pressure antinode and vice versa.
Reason - Displacement node is point of minimum displacement.