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: PART: CHARLES 
Clue: In the '80s, he played Charles Ryder, a central character in TV's "Brideshead Revisited"
[A]: jeremy irons


[Q]: Category: ALL ABOUT AUTHORS 
Clue: "The Remains of the Day" author Kazuo Ishiguro was a grouse beater for this grandmother of Prince Charles
[A]: the queen mother


[Q]: Category: BUSINESS PAIRINGS 
Clue: You've probably used some of their products: Crest, Gleem, Scope, Ivory
[A]:
procter & gamble