thanks for the correction, but according to the quiz"Every 1,000,000 city on a map", Gambia has Banjul and Bahrain has Manama as city over 1 million inhabitants. Also, I count the metro area and not the city proper.
Thanks for considering my feedback! The other quiz is sourced from a specific citypopulation.de page on urban agglomerations which is a bit self-contradictory in my opinion. Still, it's a fair source so you are right about Banjul and Manama
Please add Barbados