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: A TRIP ON THE "L" 
Clue: Big building on the back of the U.S. $5 bill
[A]: lincoln memorial


[Q]: Category: CLASSICAL MYTHOLOGY 
Clue: Some say this underworld canine has serpents entwined around his multiple necks
[A]: cerberus


[Q]: Category: PEN NAMES 
Clue: Pseudonym of the mysterious recluse who wrote "The Treasure of the Sierra Madre"
[A]:
b. traven