Two solution of a substance (non-electrolyte) are mixed in the following manner,480ml of 0.5M of first solution with 520 ml of 1.2m of second solution.The molarity of final solution is

Question

$\begin{array}{1 1}(a)\;1.20m&(b)\;1.50m\\(c)\;1.344m&(d)\;2.70m\end{array}$