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: secretary duty 
Words: correspondence, schedule, answer calls, keys, file

Answer: keys


Question: Category: physical property 
Words: sugars, fat, thin, large, angular momentum

Answer: sugars


Question: Category: emotional status 
Words: acceptable, fine, neat, relaxed, annoyed

Answer:
neat