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.

[EX Q]: Category: ELEMENT NAMES 
Clue: In 1828 a Norse god thundered onto the periodic table in the name of this element, No. 90
[EX A]: thorium

[EX Q]: Category: BORDERS 
Clue: Argentina's border with this country is 3,200 miles long, about the same as its coastline
[EX A]: chile

[EX Q]: Category: SPY NOVELS 
Clue: His most recent bestseller is "The Icarus Agenda", published in 1988
[EX A]:
robert ludlum