What is the other name of aluminium oxide?

Aluminium sulphate  Alumina  Alum  Aluminium

Alumina

The correct answer is option 2. Alumina.  The most stable form of aluminum, also known as aluminum oxide, is alumina. It is found in nature as the colorless mineral corundum and a number of colored oxides, including ruby, topaz, sapphire, and emerald, which are valued for their beauty.