The most commonly used synthetic abrasive is A. Aluminium carbide B. Boric acid C. Silicon D. All of these

Boric acid is a white, odorless, crystalline solid that is used in a variety of applications, including as a flame retardant, a flux in soldering, and a topical treatment for eye infections. Boric acid is also used in some cosmetics and as a pesticide.

Silicon is a non-metallic chemical element that is the second most abundant element in the Earth’s crust. It is used in a variety of products, including semiconductors, glass, and ceramics. Silicon is also used in some construction materials and as a lubricant.

While all of these materials are abrasive, aluminium oxide is the most commonly used synthetic abrasive.