Which of these is not a country?
Bucharest is the capital and largest city of Romania, as well as its cultural, industrial, and financial centre. It is located in the southeast of the country, at 44°25′57″N 26°06′14″ECoordinates: 44°25′57″N 26°06′14″E, on the banks of the Dâmbovița River, less than 60 km (37.3 mi) north of the Danube River and the Bulgarian border.
Oman, officially the Sultanate of Oman, is an Arab country on the southeastern coast of the Arabian Peninsula in Western Asia. Its official religion is Islam.
Panama is a country on the isthmus linking Central and South America. The Panama Canal, a famous feat of human engineering, cuts through its center, linking the Atlantic and Pacific oceans to create an essential shipping route. In the capital, Panama City, modern skyscrapers, casinos and nightclubs contrast with colonial buildings in the Casco Viejo district and the rainforest of Natural Metropolitan Park.
Palau is an archipelago of over 500 islands, part of the Micronesia region in the western Pacific Ocean. Koror Island is home to the former capital, also named Koror, and is the islands’ commercial center. The larger Babeldaob has the present capital, Ngerulmud, plus mountains and sandy beaches on its east coast. In its north, ancient basalt monoliths known as Badrulchau lie in grassy fields surrounded by palm trees.