A block suspended from a spring is released from rest when spring is unstretched. ‘x’ represents stretch in spring. Select the appropriate graph from column-II taking quantities in column - I as y-axis.

Total mechanical energy is conserved.KE increases , becomes maximum and then decreases to zero at maximum extension.Work done by gravity continuously increases linearly. Wg=mgxThe magnitude of work done on the block by spring increases parabolically. Wsp=12kx2