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: AIRLINE AD SLOGANS 
Clue: "The world's favourite airline"
[EX A]: british airways

[EX Q]: Category: THE BRITISH ISLES 
Clue: This island group that lies just north of the Scottish mainland was known to classical writers as the Orcades
[EX A]: the orkney islands

[EX Q]: Category: MEASUREMENT 
Clue: There are 16 drams in an avoirdupois one & 2 tablespoons in a fluid one
[EX A]:
an ounce