Which of the following types of radiation is not emitted by electronic structure of atoms

When electron makes transition from any higher energy level to n = 1 level, ultraviolet light is emitted. When electron jumps from any higher level to n = 2 level, visible light is emitted. X-rays are emitted when one of the electrons from some inner shell of the atom is knocked out and the vacancy so created is filled up by jumping of electron from higher energy shell. On the other hand, y-rays are emitted from the nucleus of anatom