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: NEXT LETTER AFTER... 
Clue: ...J in the Macedonian alphabet
k

Category: FASHION DESIGNERS 
Clue: This Palm Beach designer of bright prints got started when she needed clothes that hid fruit juice stains
lilly pulitzer

Category: THOSE WACKY CANADIANS 
Clue: This man from Alliston, Ontario went with the best, Charles Best, to jointly discover insulin

dr. frederick banting