The elevation in boiling point when $20.16\;g$ of freshly prepared $CuCl_2$ (relative molar mass : $134.4$) is dissolved in $1\;kg$ of water $(K_b=0.52\;kg\;K \;mol^{-1})$ is

Question

$\begin{array}{1 1} 0.075^{\circ} C \\ 0.150^{\circ}C \\ 0.234^{\circ}C \\0.468^{\circ}C \end{array} $