Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): At \( 10^\circ \mathrm{C} \), the density of a \( 5\,\mathrm{M} \) solution of \( \mathrm{KCl} \) [atomic masses of \( \mathrm{K} \) and \( \mathrm{Cl} \) are \( 39 \) and \( 35.5 \,\mathrm{g\, mol^{-1}} \) respectively], is \( x \,\mathrm{g\, ml^{-1}} \). The solution is cooled to \( -21^\circ \mathrm{C} \). The molality of the solution will remain unchanged.
Reason (R): The molality of a solution does not change with temperature as mass remains unaffected with temperature.
In the light of the above statements, choose the correct answer from the options given below.
