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


[Q]: Category: SCOTLAND 
Clue: In March 1328, in the Treaty of Northampton, the English finally recognized him as King of the Scots
[A]: robert the bruce


[Q]: Category: MEDICINE 
Clue: Poor bone marrow function is the leading cause of the aplastic type of this hemoglobin deficiency
[A]:
anemia