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: GOING WIRELESS 
Clue: Thanks to firms like Pegaso & Telemex, this country now has more cellular users than fixed line customers
[EX A]: mexico

[EX Q]: Category: 3-LETTER WORDS 
Clue: For 5 & 7 it's 12
[EX A]: sum

[EX Q]: Category: TITLES OF PRINCE CHARLES 
Clue: He's Duke of this place, also a "C"ounty in Southwest England
[EX A]:
cornwall