In which year did Dumbledore defeat Grindelwald at war?
C
Correct answer
Explanation
Dumbledore defeated the dark wizard Grindelwald in a legendary duel in 1945, which established Dumbledore's reputation as the greatest wizard of his age. This duel occurred at the height of Grindelwald's power and is referenced throughout the series as a pivotal moment in magical history. The victory coincided with the end of World War II in the Muggle world.