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BS 4-class vehicles will not be sell in India from 1 April 2020: SC
(G.N.S) Dt. 24 New Delhi Often you will hear BS-2 vehicles, BS-3 vehicles and BS-4 vehicles. But do you know what these numbers mean? Growing numbers ahead of BS means better standards of emission, which are environmentally friendly. BS is used to measure the pollution of trains in India. The