Option A — Impure copper (anode), pure copper (cathode), acidified copper sulphate solution (electrolyte).
Source: Metals and Non-metals, Section 3.4.6 Refining of Metals
The textbook clearly states: "the impure metal is made the anode and a thin strip of pure metal is made the cathode. A solution of the metal salt is used as an electrolyte." For copper, the electrolyte is acidified copper sulphate solution. Options B and C wrongly swap anode/cathode; Option D uses distilled water, which does not conduct electricity.