The correct options are
B It is the largest source of electricity in the world.
C It is used in many industrial sectors either as a fuel or as a reactant.
D Burning coal produces pollutants like mercury and sulfer dioxide that is responsible for acid rain and many respiratory illnesses.
Coal provides about half of India’s commercial primary energy supply today. Despite its emissions, it is the dominant fuel for power production in India. According to sources, the share of coal in India's energy supply is expected to fall beyond 2030. This is due to the economic feasibility and environmental benefits of adopting renewable sources of energy. India is on track to meet its commitments under the Paris Agreement. Achieving decarbonisation of India’s energy mix might take time.