Density of a 2.05M solution of acetic acid in water is 1.02 g/mL. The molality of the solution is

Question

$\begin{array}{1 1}(a)\;0.44molkg^{-1}&(b)\;1.14molkg^{-1}\\(c)\;3.28molkg^{-1}&(d)\;2.28molkg^{-1}\end{array}$