Which One of the Following Is Not a Redox Reaction

Which one of the following is not a redox reaction?

A) 2H₂(g) + O₂(g) → 2H₂O(l)
B) Zn(s) + H₂SO₄(aq) → ZnSO₄(aq) + H₂(g)
C) H₂O(l) + NH₃(g) → NH₄⁺(aq) + OH^-(aq)
D) 6FeSO₄(aq) + K₂Cr₂O₇(aq) + 7H₂SO₄(aq) → Cr₂(SO₄) ₃(aq) + 3Fe₂(SO₄) ₃(aq) + K₂SO₄(aq) + 7H₂O(l)
E) Cl₂(g) + 2KBr(aq) → Br₂(l) + 2KCl(aq)