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.

[Q]: fat, ugly, sugar, salt, protein
[A]: ugly


[Q]: fly, swim, car, beetle, grasshopper
[A]: car


[Q]: vitamin c, absorption, obese, heavy, fat
[A]:
vitamin c