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: secretary duty 
Words: organize, sort mail, fax, file, text

SOLUTION: text

PROBLEM: Category: geographical property 
Words: flat, horizontal, smooshed, elevation, house

SOLUTION: house

PROBLEM: Category: emotional status 
Words: anxious, fret, sad, strap lock, frustrated

SOLUTION:
strap lock