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.

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

Category: GOLF 
Clue: In golfing slang, to use a "Texas wedge" is to use this club when not on the green
a putter

Category: GOVERNMENT 
Clue: In both NYC & L.A., the mayor is the chief executive & this is the main legislative body

the city council