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 consistency, answers should be in all lower cased letters.
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Question: Category: STAND BY YOUR MANNEQUIN 
Clue: In a magazine called The Show Window, this Oz creator dispensed advice on mannequins & creative display

Answer: l. frank baum


Question: Category: SPACE MISSIONS 
Clue: The New Horizons mission was launched to explore this planet before it was downgraded to a dwarf

Answer: pluto


Question: Category: SCIENCE & NATURE 
Clue: In 1928 physicist Walther Muller helped this man improve his radiation detector

Answer:
hans geiger