Correct Answer: J. J. Thomson

Solution : The correct option is - J. J. Thomson

The electron was the first subatomic particle to be discovered, and J. J. Thomson, a British physicist and recipient of the Nobel Prize in Physics , is credited with its discovery. While examining cathode rays, which he found to be composed of negatively charged particles far smaller than atoms, J. J. Thomson made the discovery of the electron in 1897.