Which of the following is false?

• A

  Photochemical smog has high concentration of reducing agents and is, therefore, called as reducing smog.

• B

  Non-viable particulates consist of smoke, dust, mist, fumes, etc.

• C

  Classical smog occurs in cool humid climate and it is mixture of smoke, fog and sulphur dioxide.

• D

  Ozone reacts with unburnt hydrocarbons in polluted air to produce peroxyacetylnitrate (PAN).