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: TO REMAIN "SILENT" 
Clue: Quiet alliterative nickname of the U.S. Navy's submarine fleet
[A]: the silent service


[Q]: Category: "R"RRRRR! 
Clue: Frank Gorshin played him on the small screen, Jim Carrey on the big
[A]: the riddler


[Q]: Category: GARDENING 
Clue: Azaleas are a member of this plant genus whose name means "rose tree"
[A]:
rhododendron