Concept:Semiconductor devices are made from materials such as silicon or germanium doped into p-type and n-type regions.Explanation:A diode is a p-n junction; an LED is a light-emitting p-n junction diode; a transistor has three doped layers (n-p-n or p-n-p). All three are semiconductor devices.A capacitor is two conducting plates separated by an insulator (dielectric). It stores charge and needs no semiconductor.Answer:Option A (Capacitor)