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Rusting on the surface of iron involves ...

Rusting on the surface of iron involves :

A

`Fe(s) rarr Fe^(2+) (aq) + 2e^(-)` (at anodic site)

B

`O_(2)(g) + 4H^(+) (aq) + 4e^(-) rarr 2H_(2)O (l)` (at cathodic site)

C

`4Fe^(2+) (aq) + O_(2) (g) + 4H_(2)O (l) rarr 2Fe_(2)O_(3) (s) + 8H^(+)`

D

All of these

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The correct Answer is:
D
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