What are the anode and cathode in the galvanic cell of iron corrosion?
- AAnode: $Fe$ surface,Cathode: $O_2$ dissolved in water
- BAnode: $O_2$ dissolved in water,Cathode: $Fe$ surface
- CAnode: $Fe^{2+}$,Cathode: $Fe^{3+}$
- DAnode: $H_2O$,Cathode: $Fe$
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