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: police punishment 
Words: flyaway, jail time, ok, arrest, fine
ok

Category: computers 
Words: ram, file, prepare, keys, format
prepare

Category: nutritional value 
Words: calories, sugar, fat, bulky, heavy

bulky