Nigeria formally became a federation in
1960
1963
1914
1946
Correct answer is D
Nigeria formally became a federation 1946.
It should be noted that the 1946 constitution only laid foundation for federalism. The constitution charged the provinces to three regions of North, East West regional assemblies without legislative powers.
In 1951, the Macpherson Constitution gave legislative powers on specific issues to the regional governments.
The true federalism was then established in 1954 by the Oliver Lyttleton Constitution with the division lists between the Central and the Regional governments.