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.

Category: HANNA-BARBERA DOGS 
Clue: In one episode of the original "Jetsons", a millionaire tried to take him away
astro

Category: MONEY, MONEY, MONEY 
Clue: In 1970 this Japanese currency was at 360 to the dollar; today it's under 100
the yen

Category: ANATOMY & MEDICINE 
Clue: The thyroid gland straddles this tube also known as the windpipe

the trachea