A beaker contains a solution of substance ‘A’. Precipitation of substance ‘A’ takes place when small amount of ‘A’ is added to the solution. The solution is _________.

On the addition of the solute to a saturated solution, the solute settles down (precipitation).

For the concentrated and unsaturated solution, the excess solute gets dissolved.

A supersaturated solution is highly unstable and crystallization of solute takes place on a slight disturbance.

Thus, option (i) is the correct option.