What is the 'fibre' used to make bulletproof jackets?

Correct answer: (d) Kevlar

Explanation

Kevlar, an aramid fibre, is used to make bulletproof jackets due to its high strength, impact resistance and low weight.

It was developed by Stephanie Kwolek in 1965 at DuPont and is also used in helmets and aerospace.

Nylon, terylene and tweed lack the strength-to-weight needed to stop bullets.