<prompt> Which of the following can be used as die material?GypsumEpoxy resinElectroplated silverAll of the above  <response>: The most commonly used die materials are type IV dental stone, high-strength and type V dental stone, high-strength, high-expansion improved stones. Non-gypsum die materials are also available, such as acrylic, polyester, and epoxy resins. These materials are limited in their compatibility with impression materials.Metal dies produced from electroplated impression material have moderately high strength, adequate hardness, and excellent abrasion resistance.Phillips 12th edition page 211, 212 