Consider a metal ring kept on top of a fixed solenoid (say on a cardboard) as shown in the figure. The centre of the ring coincides with the axis of the solenoid. If the current is suddenly switched on, the metal ring jumps up. Explain.

Question

(a) due to force of attraction
(b) due to force of repulsion
(c) due to the electric field in the coil
(d) due to the magnetic flux in the coil