Given below are two statements : one is labelled as Assertion (A)...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A) : Refractive index of glass is higher than that of air.
Reason (

\mathrm{R}

) : Optical density of a medium is directly proportionate to its mass density which results in a proportionate refractive index.
In the light of the above statements, choose the most appropriate answer from the options given below :

Options

A $(\mathrm{A})$ is not correct but $(\mathrm{R})$ is correct
BBoth $(\mathrm{A})$ and $(\mathrm{R})$ are correct and $(\mathrm{R})$ is the correct explanation of (A)
C $(A)$ is correct but $(\mathrm{R})$ is not correct
DBoth (A) and (R) are correct but (R) is not the correct explanation of (A)

Correct answer

C. $(A)$ is correct but $(\mathrm{R})$ is not correct

Step-by-step solution

Refractive index has no relation with mass density because both have different meaning. Hence reason is incorrect.
So (A) is correct but (R) is not correct.

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