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


question:
Category: secretary duty 
Words: file, errands, type, folder, order office supplies
answer:
folder


question:
Category: personal characteristic 
Words: assured, classy, freezing, cool, level
answer:

freezing