The reactions shown may occur in the air during a thunder-storm.
${N_2} + {O_2} \to 2NO$
$2NO + {O_2} \to 2N{O_2}$
$NO + {O_3} \to N{O_2} + {O_2}$
Which row shows what happens to the reactant molecules in each of these reactions?

1 )
A
B
3 )
C
4 )
D
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