During whose rule did the Russian Revolution take place?
A. Alexander III
B. Nicholas II
C. Vladimir
D. Peter the Great

Hint:
> He was the tsar in power during the Russian Revolution in 1917.
> He governed Russia in January 1917, while the Bolshevik Vladimir Lenin lived in exile.
> The revolution had reversed their positions by October, leaving a prisoner to the former tsar, and Lenin retaining all power.

Complete answer:
The Russian Revolution is the collective term used in Russia in 1917 for a couple of revolutions that abolished the Tsarist autocracy and contributed to the Soviet Union's eventual rise.

The Russian Empire fell with the abdication of Emperor Nicholas II, and during the first revolution of February 1917, the old regime was replaced by a provisional government.
In October, the Provisional Government was dissolved and replaced by a Bolshevik (Communist) government in the second revolution.

This is not the correct answer, because during Alexander III rule the Russian Revolution didn't take place. Hence Option A. is an incorrect option.

This is the correct answer because during Nicholas II rule the Russian Revolution took place. Hence Option B. is a correct option.

This is not the correct answer, because during Vladimir rule the Russian Revolution didn't take place. Hence Option C. is an incorrect option.

This is not the correct answer, because during Peter the Great's rule the Russian Revolution didn't take place. Hence Option D. is an incorrect option.

Therefore, the correct answer is B

Note:
> As a powerful political belief system around the world, the Russian Revolution paved the way for the emergence of communism.
> As a world power that would go head-to-head with the United States during the Cold War, it set the stage for the rise of the Soviet Union.
> The Revolution of February was the first of two revolutions that took place in 1917 in Russia.
> Russia was an autocracy at the time of the revolution, with Tsar Nicholas II having absolute control over his subjects.