The correct answer is - Nigeria, Algeria, Egypt, and Libya.
Four of the top five countries of Africa by petroleum reserves and production are north of the equator. Nigeria is the one that has the highest reserves of this natural resource, Algeria is the third, Egypt is fourth, and Libya fifth, with Angola being between them on the second place, but Angola is south of the equator.
Despite these countries having solid amounts of this natural resource, they can not really base their economies around it and rely on it. The problem is that there's lot of fluctuations in the production of the petroleum, thus making it very unstable as an important source of income for these countries. The reason for this is primarily the instability of these countries, with ongoing conflicts, and militant groups controlling parts of the territories. Also, the infrastructure is old and it is not taken care of properly.
