Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

[EX Q]: townhome, mountain, studio, flat, apartment
[EX A]: mountain

[EX Q]: nervous, frustrated, fret, jack, concerned
[EX A]: jack

[EX Q]: current, whirlpool, signal, delayed, moon
[EX A]:
delayed