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: FEMALE SINGERS 
Clue: She's tied with Mariah Carey for most no. 1 hits by a female with 18: 12 as a member of a group & 6 as a solo act
[A]: diana ross


[Q]: Category: WORLD LEADERS 
Clue: Unopposed, he was elected to his 5th term as president in 1998; he's been in power since 1959
[A]: fidel castro


[Q]: Category: U.S.A. 
Clue: In 1999 several counties around Cape Canaveral, Florida were assigned this new telephone area code
[A]:
321