The British physicist named Paul Dirac was known to have introduced the concept of ________ in 1930.

antiparticle

The correct answer is Option (4) - antiparticle

The British physicist Paul Dirac introduced the concept of antiparticle in 1930. He predicted the existence of antimatter, which is composed of particles with the same mass as ordinary matter but with opposite electric charge. This groundbreaking concept has had significant implications in particle physics and cosmology.