Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Mayank Mishra
Phosphorescence is light released by matter after exposure to electromagnetic radiation, usually ultraviolet light. The energy source kicks an electron of an atom from a lower energy state into an excited higher energy state, the electron releases the energy in form of visible light that is luminescence, when it falls back to a lower, more stable energy state. The examples include, Fluorite, Willemite, Diamond, etc. So the first option will be correct.