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Catalytic converters are used in

$\begin{array}{1 1}(a)\;Automobiles\\(b)\;Machines\\(c)\;Threshold\;purposes\\(d)\;Photosynthesis\end{array}$

1 Answer

Catalytic converters are used in automobiles which convert the vehicular exhausts into free nitrogen.
Hence (a) is the correct option.
answered Jan 21, 2014 by sreemathi.v
 
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