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: "TWO" 
Clue: It features Jefferson on the front & the signers of the Declaration on the back
[EX A]: two-dollar bill

[EX Q]: Category: GREAT ALEXANDERS 
Clue: In 1990 Russia restored citizenship to this Nobel Prize-winning author of "Cancer Ward"
[EX A]: aleksandr solzhenitsyn

[EX Q]: Category: '90s FEMALE NO. 1 HITMAKERS 
Clue: 1999: "Genie In A Bottle"
[EX A]:
christina aguilera