Photochemical smog formed in congested metropolitan cities mainly consists of

  • A
    Ozone,peroxyacetyl nitrate and $NO_x$
  • B
    Smoke,peroxyacetyl nitrate and $SO_2$
  • C
    Hydrocarbon,$SO_2$ and $CO_2$
  • D
    Hydrocarbon,ozone and $SO_2$

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