For a dilute solution containing 2.5 g of a non- volatile non- electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is $$2^\circ C$$. Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take $$K_b = 0.76$$ K kg $$mol^{-1}$$)

A

724

B

740

C

736

D

718