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: 19th CENTURY AMERICA 
Clue: In 1875 this Republican was elected governor of Ohio; 17 months later, he took the oath of office as president

SOLUTION: hayes

PROBLEM: Category: YOU'VE GOT... 
Clue: You've got this sailor's disease if you're not getting enough vitamin C

SOLUTION: scurvy

PROBLEM: Category: -OID 
Clue: Alexander Parkes developed this synthetic plastic material in 1856

SOLUTION:
celluloid