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Neuron
The leader who found it necessary to use secret police was Ivan the Terible, or Ivan IV as he is named here - B.

With the secret police in place, he wanted to have and control a lot of aspects of the country and didn't want them to be left into uncertainty. He ruled his country with an iron fist!

The correct answer is option B - Ivan IV.

Ivan IV or Ivan The Terrible was the first tsar of Russia. He was born on August 25, 1530, and died on March 18, 1584.

He created a centrally controlled Russian state, which main characteristic was the military dominance.

He took control of Russia by forming the Oprichnina, that is an added territory that would be administrated separately from the rest of the state. It was also during this time too that he created the Oprichniki, which was the first official secret Russian police force.