You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For consistency, answers should be in all lower cased letters.

[EX Q]: Category: MONEY 
Clue: You'd use bills in this monetary unit to buy a tuba in Cuba or magazines in the Philippines
[EX A]: the peso

[EX Q]: Category: ROCKS & MINERALS 
Clue: A mixture containing antimony is sprayed on canvas to render it this
[EX A]: fireproof

[EX Q]: Category: NATURE 
Clue: These largest cacti don't develop their first branches until about age 75
[EX A]:
saguaro