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 consistency, answers should be in all lower cased letters.

Q: Category: BOTANY 
Clue: Cryptogams are not plants with secret meanings, but plants such as ferns that don't bear these

A: seeds
****
Q: Category: HEIR CONDITIONING 
Clue: 37-year-old Reza Pahlevi is the exiled heir to this country's "Peacock Throne"

A: iran
****
Q: Category: QUOTES 
Clue: He wrote in "Candide", "If this the best of possible worlds, what then are the others?"

A:
voltaire
****