A balanced redox equation must have which of the following: I. The same number of each type of atom on both sides of the equation
II. The total number electrons lost in the oxidation equal to total number of electrons gained in the reduction
III. The same total charge of all ionic species on both sides of the reaction
IV. H2O present as a product or a reactant

1. i, ii, and iii
2. i and ii
3. i, iii, and iv
4. i, ii, iii, and iv
5. iii and iv