Combustion and Flame

Match the items of Column A with the items of Column B.
Column A Column B
(a) Oxides of sulphur and nitrogen (i) fire extinguisher
(b) CNG (ii) incomplete combustion of coal
(c) Oxygen (iii) very low ignition temperature
(d) inflammable substance (iv) acid rain
(e) carbon dioxide (v) necessary for combustion
(f) carbon monoxide (vi) fuel for automobiles.