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.

[Q]: Category: NEXT LETTER AFTER... 
Clue: ...J in the Macedonian alphabet
[A]: k


[Q]: Category: THE FICTIONAL LAND OF OZ 
Clue: This paving material of the road to the Emerald City is in need of repairs
[A]: yellow brick


[Q]: Category: "AZ" I WAS SAYING 
Clue: The title of this 1969 Alfred Hitchcock film comes from the code name of a French spy ring
[A]:
topaz