In fuel cells the reaction takes place at anode is

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H2g+2OH− aq→ 2H2Ol+2e−

O2g+2H2Ol+4e−→ 4OH−aq

4OH−→ O2+2H2O+4e−

2H++2e−→ H2↑

answer is A.

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Detailed Solution

At anode oxidation of H2 takes place. H2g+2OH− aq→ 2H2Ol+2e−

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