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.

Category: personal characteristic 
Words: freezing, calm, positive, cool, popular
freezing

Category: secretary duty 
Words: fax, program, file, make coffee, answer
program

Category: moral characteristic 
Words: size, equitable, fair, alright, fine

size