The correct answer is: a) Hydropower.
Arunachal Pradesh has vast potential for hydropower generation. The state has a number of rivers that flow through it, and these rivers have the potential to generate a significant amount of electricity. In fact, Arunachal Pradesh has the potential to generate more hydropower than any other state in India.
Thermal power is generated by burning fossil fuels such as coal or oil. This type of power generation is not sustainable in the long term, as it contributes to climate change. Solar power is generated by using the sun’s energy to convert water into steam. This type of power generation is sustainable, but it is not as efficient as hydropower. Wind power is generated by using the wind to turn turbines. This type of power generation is sustainable, but it is not as efficient as hydropower or solar power.
In conclusion, Arunachal Pradesh has vast potential for hydropower generation. This type of power generation is sustainable and efficient, and it has the potential to meet the energy needs of the state and the country.