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

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

$\Delta T_b=iK_bm$
$\therefore \Delta T_b$ is directly proportional to the molality of solution.
Hence (c) is the correct option.