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The cell for which the cell reaction is ...

The cell for which the cell reaction is `H_2 + Cu^(2+) to 2H^(+) + Cu` is represented as

A

`Cu//Cu^(2+)//H^(+)//H_(2)`

B

`H_(2(g))//H^(+) "//"Cu^(2+)//Cu`

C

`Pt, H_(2)(1 atm), H^(+)"//"Cu^(2+)//Cu`

D

`Pt, H_(2)//H_((aq))^(+) (1atm)"//"Cu^(2+) //Cu`

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