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]: vitamin c, salt, fat, big, absorption
[EX A]: absorption

[EX Q]: fire, hire, heat, inferno, earth
[EX A]: hire

[EX Q]: suits, board, deck, pack, box
[EX A]:
box