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.
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Question: Category: I GOT 3 As, MOM! 
Clue: In legend, this pure knight found the Holy Grail

Answer: galahad


Question: Category: RULERS 
Clue: In 770 this king of the Franks married Desiderata, daughter of the Lombard king Desiderius

Answer: charlemagne


Question: Category: "MUM"s THE WORD 
Clue: This phrase for meaningless talk or nonsense is a corruption of an African spirit's name, Mama Dyumbo

Answer:
mumbo-jumbo