Which of the following country had been under dictatorship for long?
Among the given options, Brazil is the country which was under dictatorship for long time i.e. from April 1, 1964 to March 15, 1985. It began with the 1964 led by the Armed Forces against the administration of the President Joao Goulart, who had assumed the office after being Vice-President, upon the resignation of the democratically elected president Janio Quadros. This came to an end when Brazil became fully democratic in the year 1985 and Jose Sarney took the office.