(c) I and III
Lexan is a kind of polycarbonate i.e. thermosetting polymers containing carbonate groups. They are strong, tough materials, and are optically transparent. This is why a laminated polycarbonate (Lexan) is used to make bulletproof glass.
Kevlar is the material used in bullet-proof vests. It is also used in a wide of industries for various applications. Some of which are shoes, audio equipment, personal gear, and also smartphones.
