Arrange the following hydrocarbon fuels in increasing order of their polluting strength: $LPG$,$CNG$,and Kerosene.

  • A
    $CNG < LPG < \text{Kerosene}$
  • B
    $LPG < CNG < \text{Kerosene}$
  • C
    $Kerosene < LPG < CNG$
  • D
    $CNG < Kerosene < LPG$

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