Assertion :The excess pressure above atmospheric pressure is usually called as gauge pressure. Reason: Gauge pressure $=$ (Total pressure) $-$ (atmospheric 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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Gauge pressure is defined as the difference in total pressure acting on the body and the atmospheric pressure.
Gauge pressure = Total pressure - atmospheric pressure
Hence both the assertion and the reason statements are correct and the reason explains the assertion very well.

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