TASK DEFINITION: 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.
PROBLEM: Category: CLASSIC ROCK LYRICS 
Clue: Jan & Dean sang that there were "two girls for every boy" here

SOLUTION: "surf city"

PROBLEM: Category: ON THE COVER OF ROLLING STONE 
Clue: "Nothing Compares" to this singer seen on covers in 1990 & '91, & with even less hair in '92

SOLUTION: sinead o\'connor

PROBLEM: Category: NATURE STUDY 
Clue: Imperfect flowers lack one of these 2 reproductive organs

SOLUTION:
pistils & stamens