Sulphur oxides which are responsible for major air pollution are caused by

Options

A. burning of coal and refining of petroleum
B. burning of fuels in automobiles
C. combustion of fuels containing C and H
D. using indoor combustion devices like cooking gas.

Answer

A

Explanation

Main sources of oxides of sulphur are burning of fossil fuels , coal , petroleum , refining of petroleum, smelting of sulphide ores etc.