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 simplicity, answers should be in all lower cased letters.
PROBLEM: Category: NOTABLE WOMEN 
Clue: Denied a college education in her own country, in 1903 she became the first woman in France to earn her doctorate

SOLUTION: marie curie

PROBLEM: Category: FEMALE SINGERS 
Clue: She's tied with Mariah Carey for most no. 1 hits by a female with 18: 12 as a member of a group & 6 as a solo act

SOLUTION: diana ross

PROBLEM: Category: BUSINESS & INDUSTRY 
Clue: Country that manufactures the most cars per year

SOLUTION:
japan