You sighed, realizing the true answer. The quiz wasn't asking for a definition. It was a pun on a specific Nintendo character. A character known for having "100" appendages... or maybe you were overthinking it again.
The three wrong answers are deliberately absurd:
Not every player in 2007 (or today) knows the Hitchhiker’s Guide reference. For those players, the question appears impossible—hence fitting the game’s title.
You can obtain the game's final Fusestopper here by clicking the purple flower on Ponk's neck. The Impossible Quiz Book (Chapter 2) The Question: "Which planet is furthest from The Sun?"
Q66 is a litmus test for cultural literacy and the player’s ability to recognize when the game is not trying to trick them—which, ironically, is itself a form of trick.
Your mind scrambled for context. Hectopus? Was this a biology question? You racked your memory. You tried to dissect the word.