What does LED stand for?

Light-emitting diode is what it stands for. Compared to incandescent light bulbs, LED lighting products are up to 90% more efficient in producing light. A LED is a semiconductor-based electronic gadget. Depending on the type of semiconductor, when electric current is sent through it, it emits light at various wavelengths or colours.
P-type and n-type semiconductors are combined to create a diode. In n-type semiconductors, electrons make up the majority of the charge carriers, while holes make up the majority in p-type semiconductors. These charge carriers interact with one another when electric current is delivered to the diode, resulting in the production of energy in the form of photons or light. Now, the sort of material utilised in the semiconductor determines the wavelength of the photons released. There are several semiconductors that emit light in the visible spectrum, including gallium arsenide (GaAs), gallium arsenide phosphide (GaAsP), and others.

Hence Option C is the correct answer.