The correct answer is: a) Electric cars.
The Mizoram government offers subsidies to promote the use of electric cars. This is because electric cars are more environmentally friendly than traditional gasoline-powered cars. They also produce less noise pollution, which is important in a state like Mizoram, where there is a lot of natural beauty to be preserved.
CNG buses are also a good option for reducing pollution, but they are not as efficient as electric cars. Two-wheeler taxis are not a good option for reducing pollution, as they are often very noisy and produce a lot of emissions. Private car ownership is not a good option for reducing pollution, as it leads to more traffic congestion and air pollution.
In addition to offering subsidies for electric cars, the Mizoram government has also taken other steps to promote the use of renewable energy. For example, the government has installed solar panels on government buildings and schools. The government has also encouraged the use of solar-powered water heaters and cookers. These measures have helped to reduce the state’s reliance on fossil fuels and improve air quality.