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: PICTURES AT AN EXHIBITION 
Clue: His 1960s works include "I Know How You Must Feel, Brad!" & "As I Opened Fire..."
[A]: roy lichtenstein


[Q]: Category: -OLOGIES 
Clue: Seismology studies the seismic waves produced by these plate shifts
[A]: earthquakes


[Q]: Category: MR. AND MRS. SMITH 
Clue: An annual festival in Sydney, Australia honors Maria Smith, the originator of this famous apple
[A]:
the granny smith apple