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: PEOPLE 
Clue: The first name of this "Ally McBeal" star means "most beautiful" in Greek
[A]: calista


[Q]: Category: WORLD GEOGRAPHY 
Clue: This European grand duchy has 2 distinct land regions: the Ardennes & the Bon Pays
[A]: luxembourg


[Q]: Category: ABSOLUTELY NOTHING 
Clue: In math, a set containing no elements is called an empty set or this type
[A]:
null set