A) \[N{{O}_{2}}\]
B) \[S{{O}_{2}}\]
C) \[C{{O}_{2}}\]
D) \[{{H}_{2}}\]
Correct Answer: A
Solution :
They discharge gases and particles (carbon dioxide, water vapour\[({{H}_{2}}O)\], nitric oxide\[(NO)\], nitrogen dioxide\[(N{{O}_{2}})\], sulfur oxides \[(S{{O}_{2}})\] and soot.
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