Electrolytic cell is a device
in which a non-spontaneous chemical reaction is carried out at the expense of electrical energy
ln which a spontaneous chemical reaction is carried out to generate electrical energy
in which applied opposite potential is less than the cell potential
Both (a) and (c)
When Eext>E generated, the cell behaves like an electrolytic cell. In this cell a non-spontaneous reaction is carried out at the expense of electrical energy.