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Steps taken by the Government of India to control air pollution include

1. compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons.
2. permission to use only pure diesel with a maximum of 500 ppm sulphur as fuel for vehicles.
3. use of non-polluting Compressed Natural Gas (CNG) only as fuel by all buses and trucks.
4. compulsory mixing of 20% ethyl alcohol with petrol and 20% biodiesel with diesel.

Correct answer: compulsory PUC (Pollution Under Control) certification of petrol driven vehicles which tests for carbon monoxide and hydrocarbons.

Solution

The Government of India mandates Pollution Under Control (PUC) certification for petrol-driven vehicles to monitor emissions of carbon monoxide and hydrocarbons, which helps reduce air pollution. Other options are either incorrect or not fully implemented.

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