Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R:

Assertion A: $\mathrm{pK}_{\mathrm{a}}$ value of phenol is 10.0 while that of ethanol is 15.9 .

Reason R: Ethanol is stronger acid than phenol.

In the light of the above statements, choose the correct answer from the options given below:

1. A A is false but R is true.
2. B Both $A$ and $R$ are true but $R$ is NOT the correct explanation of $A$.
3. C Both $\mathrm{A}$ and $\mathrm{R}$ are true and $\mathrm{R}$ is the correct explanation of $\mathrm{A}$.
4. D $A$ is true but $R$ is false. Correct answer