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: CLEANING UP 
Clue: In 1887 Johnson & Johnson was incorporated in part to improve upon this man's study of antisepsis
[A]: lister


[Q]: Category: A DELICATE OPERATION 
Clue: A bypass operation may bypass the carotid or coronary one of these
[A]: artery


[Q]: Category: CLASSIC LOGOS 
Clue: Metro's bird lost out to this animal to be the symbol of the Metro-Goldwyn-Mayer Studios
[A]:
leo the lion