Assertion :The change in air pressure affects the speed of sound. Reason: The speed of sound increases is proportional to the square of pressure.

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 incorrect
Speed of sound in cases is independent of pressure because $v = \sqrt{\frac{γ P}{p}}$
At constant temperature, if $P$ changes then $p$ also changes in such a way that the ratio $\frac{P}{p}$ remains constant. Hence there is no effect of the pressure change on the speed of sound.

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