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.

[EX Q]: Category: HEIR CONDITIONING 
Clue: 37-year-old Reza Pahlevi is the exiled heir to this country's "Peacock Throne"
[EX A]: iran

[EX Q]: Category: LETHAL WEAPONS 
Clue: In the largest man-made explosion in history, the USSR detonated a 50-megaton one of these in 1961
[EX A]: a hydrogen bomb

[EX Q]: Category: ARNOLD SCHWARZENEGGER 
Clue: In "The Guinness Book of Film", this catchphrase ranks as the fourth best movie quote ever
[EX A]:
"i\'ll be back!"