When a solute is dissolved in a solvent,the elevation of boiling point of solution is

Question

$\begin{array}{1 1}(a)\;\text{inversely proportional to the normality of solution}\\(b)\;\text{inversely proportional to the molarity of solution}\\(c)\;\text{directly proportional to the molarity of solution}\\(d)\;\text{directly proportional to the normality of solution}\end{array}$