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: FAMILIAR PHRASES 
Clue: It's "The shortest distance between two points"
straight line

Category: 19th CENTURY LITERARY QUOTES 
Clue: This vessel under Captain Nemo was "cigar in shape" with "two hulls, one inside, the other outside"
the nautilus

Category: AUTOMOBILES 
Clue: Good brands of this ethylene-glycol base fluid contain rust inhibitors & lubricants

antifreeze