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.

[Q]: Category: GENERAL SCIENCE 
Clue: A horse's hooves are made up of this protein, the same protein found in your fingernails
[A]: keratin


[Q]: Category: WHAT THE "L"? 
Clue: When you sprain your ankle, you tear or twist these tissues that connect the leg & foot bones
[A]: ligaments


[Q]: Category: BOOKS & AUTHORS 
Clue: Margaret Mitchell began this book, "Scarlett O'Hara was not beautiful, but men seldom realized it..."
[A]:
"gone with the wind"