Which of the Following Is NOT an Important Reaction in the Production

Which of the following is NOT an important reaction in the production of photochemical smog?

A) H₂O₂(g) + O₂(g) $\to$ O₃(g) + H₂O(g)
B) N₂(g) + O₂(g) $\to$ 2 NO(g)
C) O₃(g) + NO(g) $\to$ O₂(g) + NO₂(g)
D) NO₂(g) $\to$ NO(g) + O(g)
E) N₂(g) + 3 O₂(g) + OH(g) + CH₃CHO(g) $\to$ CH₃(O) O₂NO₂(g) + H₂O(g) + NO₂(g)