Which One of the Following Is Not a Redox Reaction

Multiple Choice

Which one of the following is not a redox reaction?

A) 2H ₂( g) + O ₂( g) → 2H ₂O( l)
B) Zn( s) + H ₂SO ₄( aq) → ZnSO ₄( aq) + H ₂( g)
C) H ₂O( l) + NH ₃( g) → NH ₄+( aq) + OH ⁻( aq)
D) 6FeSO ₄( aq) + K ₂Cr ₂O ₇( aq) + 7H ₂SO ₄( aq) → Cr ₂(SO ₄) ₃( aq) + 3Fe ₂(SO ₄) ₃( aq) + K ₂SO ₄( aq) + 7H ₂O( l)
E) Cl ₂( g) + 2KBr( aq) → Br ₂( l) + 2KCl( aq)