Which of the following statements are correct ?
(i) Catalytic converters convert unburnt hydrocarbons into `CO_(2)` and `H_(2)O` .
(ii) The catalytic converter converts carbon monoxide and nitric oxide into `CO_(2)` and `N_(2)` .
(iii) Automobiles are the major cause of atmospheric pollution in the world.
(iv) Proper maintenance of automobiles along with the use of lead-free petrol or diesel cannot reduce the pollutants they emit.
(v) In India, the Air (Prevention and Control of Pollution) Act came into force in 1981 amended in 1987 to include noise as air pollutants.