In the elctrolysis of alumina using cryotile, the reaction that takes place at cathode is

In the elctrolysis of alumina using cryotile, the reaction that takes place at cathode is
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In the elctrolysis of alumina using cryotile, the reaction that takes place at cathode is A. `12F^(-) to 6 F_(2)+ ... 2)` D. `4Al^(3+)+12e^(-) to 4Al`
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