Which pairs is not correctly matched? Current Name Old Name

The incorrect pairing is option 3. Harare was formerly called Salisbury — the city’s name was changed after independence/transitionary renaming processes. Ethiopia is correctly associated with its older name Abyssinia, a historical exonym still noted in reference works [1]. Kinshasa was formerly Leopoldville under colonial rule, and the name change to Kinshasa is well documented [1]. By contrast, Ghana’s colonial-era name was the Gold Coast, not Dutch Guiana; Dutch Guiana refers to the colony that became Suriname. Therefore Ghana: Dutch Guiana is a mismatched pair (option 3).

Sources

1. [1] https://www.cia.gov/the-world-factbook/references/geographic-names/
2. [2] https://www.cfr.org/timeline/eastern-congo-legacy-intervention