Which of the following is a redox reaction?
KCI(aq) + H2SO4(aq) → KHSO4(aq) + HCI(aq)
2FeBr2(aq) + Br4(aq) → 2FeBr3(aq)
3AgNO(aq) + FeCl3(aq) → 3AgCl(aq) + Fe(NO3)3(aq)
H2CO3(aq) → H2O(I)2- + CO2(g)
Correct answer is B
No explanation has been provided for this answer.