Electrolytic refining is a process used to purify metals by utilizing the principle of electrolysis. It is commonly employed for refining silver, among other metals. In the electrolytic refining of silver, several factors come into play, including the anode, cathode, and the electrolyte used.

Anode:
The anode is the electrode where oxidation occurs during electrolysis. In the electrolytic refining of silver, impure silver metal is used as the anode. This impure silver contains various impurities such as copper, lead, and other metals that need to be removed. By using the impure silver as the anode, these impurities are oxidized and separated from the silver during the electrolysis process.

Cathode:
The cathode is the electrode where reduction occurs during electrolysis. In the case of silver electrolytic refining, pure silver is used as the cathode. The pure silver is obtained from a different source, usually in the form of silver chloride or silver nitrate. As the electrolysis process takes place, the silver ions from the electrolyte are reduced and deposited onto the cathode, resulting in the formation of pure silver metal.

Electrolyte:
The electrolyte is the solution that facilitates the flow of ions during electrolysis. In the electrolytic refining of silver, silver nitrate (AgNO3) solution is commonly used as the electrolyte. The silver ions from the electrolyte migrate towards the cathode, where they are reduced and deposited as pure silver metal. Meanwhile, the impurities from the anode are oxidized and dissolve into the electrolyte, forming soluble compounds that can be easily separated from the purified silver.

Summary:
In summary, the correct options for the electrolytic refining of silver are A, B, and D. Impure silver metal is used as the anode, pure silver as the cathode, and AgNO3 solution as the electrolyte. By utilizing these components and the principles of electrolysis, impurities in the silver anode are separated and removed, resulting in the production of pure silver metal at the cathode.