Correct option is B
Information Booster:
Nicholas II – Romanovs - Correct. Nicholas II was the last Emperor of Russia and belonged to the Romanov dynasty.
CHEKA – currency - Incorrect. CHEKA was not related to currency.CHEKA was the first Soviet secret police organization, established in 1917 by Lenin to suppress counter-revolutionaries and political dissent.It later evolved into the KGB.So, this match is incorrect.
Red Army – Trotsky - Correct. Leon Trotsky was the founder and commander of the Red Army during the Russian Civil War.
Iskra – Lenin - Correct. Iskra (meaning "The Spark") was a political newspaper founded by Lenin and other Russian Marxists in 1900 to spread revolutionary ideas.