The correct answer is: a) Thermal (coal-based).
Thermal power plants are the most common type of power plant in Andhra Pradesh, accounting for over 80% of the state’s electricity generation. These plants use coal to heat water, which turns into steam and drives a turbine to generate electricity.
Hydroelectric power plants are the second most common type of power plant in Andhra Pradesh, accounting for about 10% of the state’s electricity generation. These plants use the power of moving water to turn a turbine to generate electricity.
Renewable (solar, wind) power plants are the least common type of power plant in Andhra Pradesh, accounting for less than 1% of the state’s electricity generation. These plants use the sun or wind to generate electricity.
Nuclear power plants are not currently in operation in Andhra Pradesh.