Which method is used to produce electricity in hydroelectric power plant (a)by boiling water to produce steam (b)by ionizing water (c) by running dynamo by kinetic energy (d)any of the above

Dear Student ,

A hydroelectric dam installation uses the potential energy of the water retained in the dam to drive a water turbine which in turn drives an electric generator. The available energy therefore depends on the head of the water above the turbine and the volume of water flowing through it.
So here option (c) is correct .
Regards