Which of the following pairs of countries was once a single country?. Ethiopia and Eritrea. Eritrea and Sudan. Somalia and Ethiopia. Eritrea and Madagascar

Ethiopia and Eritrea

Eritrea became part of a federation with Ethiopia, the Federation of Ethiopia and Eritrea. Subsequent annexation into Ethiopia led to the Eritrean War of Independence, ending with Eritrean independence following a referendum in April 1993.

A. Ethiopia and Eritrea is the best answer.