Question

9 tsar nicholas ii resigned his throne during the
october revolution
march revolution
february revolution
november revolution

Explanation:

The February Revolution in 1917 led to the abdication of Tsar Nicholas II. The March Revolution is not a standard term for this event. The October Revolution (also known as the Bolshevik Revolution) occurred later and was more about the rise of the Bolsheviks to power, not the Tsar's abdication. There is no widely - recognized "November Revolution" in this context related to the Tsar's abdication.

Answer:

February Revolution