Assertion :Density of a substance is the ratio of mass of the substance to its volume Reason: Relative density is the ratio of density of substance to the density of water at 4 $^{\circ}$ C

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
The density of a substance (ratio of mass and volume) is a defined physical quantity irrespective of any other defined quantity both the statements are correct but the reason does not explain the assertion at all.

Hence, (B) option is correct

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