Solve this following

If $\left(\begin{array}{cc}x & y \\ 3 y & x\end{array}\right)\left(\begin{array}{l}1 \\ 2\end{array}\right)=\left(\begin{array}{l}3 \\ 5\end{array}\right)$ then

A. $x=1, y=2$

B. $x=2, y=1$

C. $x=1, y=1$

D. none of these