The correct answer is (a) 11%.
Renewable energy sources include hydropower, wind power, solar power, biomass, and geothermal energy. As of December 2011, renewable energy sources accounted for 11% of the total generation capacity in the energy sector of India. This is a significant increase from the 5% share that renewable energy sources held in 2000. The increase in the share of renewable energy is due to a number of factors, including government policies that promote the use of renewable energy, technological advances that have made renewable energy more affordable, and growing public awareness of the environmental benefits of renewable energy.
Hydropower is the largest source of renewable energy in India, accounting for 5.3% of the total generation capacity. Wind power is the second largest source of renewable energy, accounting for 3.3% of the total generation capacity. Solar power is the third largest source of renewable energy, accounting for 2.2% of the total generation capacity. Biomass is the fourth largest source of renewable energy, accounting for 0.8% of the total generation capacity. Geothermal energy is the smallest source of renewable energy, accounting for 0.1% of the total generation capacity.
The growth of renewable energy in India is expected to continue in the coming years. The government has set a target of increasing the share of renewable energy to 20% of the total generation capacity by 2022. This target is ambitious, but it is achievable given the current trends in the growth of renewable energy.