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: chocolate food 
Words: rich, molasses, fudge, brownies, wrongful
wrongful

Category: type of sandwich 
Words: meeting, bacon, submarine, toast, club
meeting

Category: physical activity 
Words: lift, exercise, fall, cold, run

cold