Which cities lies directly east of buenos aires Santiago or Lima Montevideo Brasilla?

Montevideo is the capital of Uruguay and is located on the eastern coast of South America. Buenos Aires is the capital of Argentina and is located on the western coast of the Río de la Plata estuary. Santiago is the capital of Chile and is located in the central part of the country. Lima is the capital of Peru and is located on the western coast of South America. Brasília is the capital of Brazil and is located in the central part of the country.