Solve:$y\;dx-x\;dy=x^2y\;dx$

Question

$\begin{array}{1 1} (A)\;y=c\;e^{\Large\frac{-x^2}{2}+x} \\ (B)\;x=c\;e^{\Large\frac{-x^2}{2}+y} \\(C)\;xc\;e^{\Large\frac{-x^2}{2}+x}=0 \\ (D)\;yc\;e^{\Large\frac{-x^2}{2}+x}=0\end{array} $