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: THE INSTRUMENT OF DEATH 
Clue: In 1793 Jean-Paul Marat was retired in the bath with one of these
[A]: a knife


[Q]: Category: ON THE GO 
Clue: John Ericsson, who built a steam locomotive in England in 1829, built this famous Civil War steam-powered ship
[A]: the monitor


[Q]: Category: ADJECTIVES 
Clue: It describes notched, sawlike teeth, as on the blade of a bread knife
[A]:
serrated