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.
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Question: Category: chocolate food 
Words: rich, chocolate, fudge, chocolate cake, unwarranted

Answer: unwarranted


Question: Category: physical activity 
Words: trip, jump, fall, equinox, exercise

Answer: equinox


Question: Category: nutritional value 
Words: fiber, big boned, protein, carbs, fat

Answer:
big boned