Northern Nigeria became internally self-government in? by Sunday | Jul 18 | Government WAEC | 0 comments A. 1955 B. 1957 C. 1958 D. 1959 E. 1960 Correct Answer: Option D – 1959 Users Also Read These:Nigeria became a federation of four regions in?Nigeria became a federation of thirty-six state…Nigeria formally became a federation in?A major reason for the introduction of indirect rule…The central legislature of Nigeria became bicameral in?