There are 4 energy sublevels are present in the principal energy level n = 4.
Sub-level is a type of level that is lower than another level or it is a part or component of a big level. S, p, d and f are the four energy levels in which electrons are present.
So we can conclude that 4 energy sublevels are present in the principal energy level n = 4.
Learn more about energy here: https://brainly.com/question/13881533
#SPJ1