TASK DEFINITION: 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.
PROBLEM: Category: nutritional value 
Words: sugar, calories, iron, fat, area

SOLUTION: area

PROBLEM: Category: police punishment 
Words: prime, penalty, fine, mad, arrest

SOLUTION: mad

PROBLEM: Category: boxing terminology 
Words: canvas, jab, deck, level, rudder

SOLUTION:
rudder