Who was the communist leader of cuba during the cuban missile crisis?
a. joseph stalin
b. vladimir lenin
c. fidel castro
d. leon trotsky

It was Fidel Castro or letter c.  The Russians deployed missiles into Cuba that alarmed the Americans and resulted in standoff where the world was on the edge of nuclear war.  At first both side did not budged but later reason prevailed and after secret negotiations the Russians removed their missiles in Cuba while the Americans removed their missile in Turkey and Italy.