S Block Elements

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

Assertion A: \(\mathrm{LiF}\) is sparingly soluble in water.

Reason R: The ionic radius of \(\mathrm{Li}^{+}\) ion is smallest among its group members, hence has least hydration enthalpy.

In the light of the above statements, choose the most appropriate answer from the options given below.