Who among the  following discovered the neutrons ?

J. Chadwick

The correct answer is option 1. J. Chadwick.

The scientist who discovered neutrons is J. Chadwick.

James Chadwick, an English physicist, is credited with the discovery of the neutron in 1932. Through his experiments, Chadwick demonstrated the existence of neutrons, which are neutral subatomic particles found in the nucleus of atoms. His discovery of the neutron provided crucial insights into the structure of the atom and contributed significantly to the development of nuclear physics.