# A solution of non-volatile solute in water freezes at $-0.30^{\large\circ}$C. The vapour pressure of pure water at 298K is 23.51 mm Hg and $K_f$ for water is 1.86 degree/molal. Calculate the vapour pressure of this solution at 298K.

23.44mm Hg
Hence (A) is the correct answer.