Applications of colligative properties are very useful i day-to-day life. One of its examples is the use of ethylene glycol and water mixture as anti-freezing liquid in the radiator of automobiles A solution M is prepared by mixing ethanol and water. The mole fraction of ethanol in the mixture is 0.9 .Given : Freezing point depression constant of water $=1.86Kkgmol^{-1}$,Freezing point depression constant of ethanol =$2.0Kkgmol^{-1}$,Boiling point elevation constant of water =$0.52Kkgmol^{-1}$,Boiling point elevation constant of ethanol $=1.2Kkgmol^{-1}$ .Water is added to the solution M such that the mole fraction of water in the solution becomes 0.9. The boiling point of this solution is

376.2 K
Hence (B) is the correct answer.