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 simplicity, answers should be in all lower cased letters.

Category: BONUS MOVIE 
Clue: He played Mr. Banks, the "Father of the Bride"
steve martin & spencer tracy

Category: CLASSICAL MYTHOLOGY 
Clue: Achilles died after one of these weapons wounded him in the heel
an arrow

Category: 100 _____ MAKE A.... 
Clue: 100 of these make up a French franc

centimes