TASK DEFINITION: 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.
PROBLEM: Category: "X" IN THE CITY 
Clue: Famous for temple ruins, this city on the site of Thebes has been called "The World's Greatest Open-Air Museum"

SOLUTION: luxor

PROBLEM: Category: LOW TECH 
Clue: Stone item seen here from the Neolithic, or "New Stone" Age

SOLUTION: arrowhead

PROBLEM: Category: THE NATIONAL INVENTORS HALL OF FAME 
Clue: Blumberg & Millman shot into the Hall in 1993 with their vaccine for the B strain of this

SOLUTION:
hepatitis