Which of the following reactions is a decomposition redox reaction?

Question

P₄(s) + 3OH^$-$(aq) + 3H₂O(l) $\to$ PH₃(g) + 3H₂PO$_2^ - $(aq)

2Pb(NO₃)₂(s) $\to$ 2PbO(s) + 4NO₂(g) + O₂(g)

N₂(g) + O₂(g) $\to$ 2NO(g)

Cl₂(g) + 2OH^$-$(aq) $\to$ ClO^$-$(aq) + Cl^$-$(aq) + 4H₂O(l)

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