instruction:
Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
question:
Category: employment activity 
Words: pay, instruct, heat, fire, scold
answer:
heat


question:
Category: nutritional value 
Words: iron, heavy, vitamin c, fat, brittleness
answer:
brittleness


question:
Category: consumer product 
Words: content, jealous, file, merchandise, thing
answer:

jealous