Whose oxidation and reduction is carried out in a hydrogen-oxygen fuel cell?
- A$H_2$ is oxidized and $O_2$ is reduced.
- B$O_2$ is oxidized and $H_2$ is reduced.
- C$H_2$ is oxidized and $H_2O$ is reduced.
- D$H_2O$ is oxidized and $O_2$ is reduced.
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