Roots of the equation $12x^2+mx+5=0$ are in the ratio $3 : 2$,then $m$ equals

Question

$\begin{array}{1 1}(A)\;\large\frac{5}{12}&(B)\;\large\frac{1}{12}\\(C)\;\large\frac{5\sqrt{10}}{12}&(D)\;5\sqrt{10}\end{array}$