The Following Reaction Occurs in a Newly Developed Battery $\longrightarrow$ Fe₂O₃(s) + ZnO(s) + 2K₂ZnO₂(aq)
A) +1

The following reaction occurs in a newly developed battery. This battery is called the super iron battery because iron occurs in the unusual oxidation state of ________
2K₂FeO₄(aq) + 3Zn(s) $\longrightarrow$ Fe₂O₃(s) + ZnO(s) + 2K₂ZnO₂(aq)

A) +1.
B) +2.
C) +3.
D) +6.
E) +9.