Two blocks of masses $m_1=m$ and $m_2=2m$ are connected by a light string passing over a frictionless pulley.The mass $m_1$ is placed on a smooth inclined plane of inclination $\theta=30^{\large\circ}$ and mass $m_2$ hangs vertically as shown in figure below.If the system is released,the blocks move with an acceleration equal to

Question

$\begin{array}{1 1}\large\frac{g}{4}\\\large\frac{g}{3}\\\large\frac{g}{2}\\g\end{array}$