When the sample of Cu with Zn as impurity is to be purified by electrolysis, the appropriate electrodes are :

Options

A. `{:(,,"Cathode","Anode"),(,"1)","Pure copper","Impure sample"):}`
B. `{:(,,"Cathode","Anode"),(,"2)","Pure zinc","Pure copper"):}`
C. `{:(,,"Cathode","Anode"),(,"3)","Impure sample","Pure copper"):}`
D. `{:(,,"Cathode","Anode"),(,"4)","Impure zinc","Impure sample"):}`

Answer

1