A system as shown in figure is in equilibrium and is at rest. The spring and string are massless, now the string is cut. The acceleration of the masses '2m' and 'm' just after the string is cut, will be
1
\(\frac{g}{2}\) upwards, g downwards
2
g upwards, \(\frac{g}{2}\) downwards
3
g upwards, 2g downwards
4
2g upwards, g downwards