The acceleration of 3 kg mass in figure shown is ( assume $g = 10 m/s^2 )$ :

Question

$\begin {array} {1 1} (1)\;3\large\frac{1}{3}\: m/s^2\: upwards & \quad (2)\;Zero \\ (3)\;16\large\frac{2}{3}\: m/s^2\: downwards & \quad (4)\;3\large\frac{1}{3}m/s^2\: downwards \end {array}$