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.

[Q]: Category: ASIAN HISTORY 
Clue: This peninsula of 85,000 square miles was ruled by a single dynasty from 1392 to 1910
[A]: korea


[Q]: Category: 20th CENTURY AMERICA 
Clue: Experts say Glenn McDuffie is the mystery man in the classic Eisenstaedt photo taken in this year
[A]: 1945


[Q]: Category: SCIENCE HISTORY 
Clue: In 1672 Christiaan Huygens sketched its southern ice cap
[A]:
mars