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: ANIMALS 
Clue: Also called a warrigal, this wild dog is one of the few nonmarsupial mammals of Australia
dingo

Category: TO PROTECT 
Clue: This "service" is best known for protecting the president, but also investigates forgery
the secret service

Category: HERE COME THE "COP"S 
Clue: Christian sect principally found in Egypt

coptics