When an aqueous solution of copper sulphate is electrolysed using copper electrodes the reaction at the anode is represented by

Options

A. `H^(+) +e^(-) rarr H`
B. `Cu^(2+) +2e^(-) rarr Cu`
C. `SO_(4(aq))^(2-) rarr SO_(4)+2e^(-)`
D. `Cu_((s)) rarr Cu_((aq))^(2+) +2e^(-)`