Three countries can be said to border Brazil and Argentina, they are Bolivia, Paraguay and Uruguay.
Argentina
The country that borders Brazil, Bolivia, and Argentina is Paraguay.
Paraguay is located on the continent of South America. Argentina borders it to the south and southwest. Brazil borders it to the east and northeast. Bolivia borders Paraguay to the northwest. Because of its central location, it sometimes is referred to as 'Corazon de America' ['Heart of America'].
Uruguay
Bolivia.
The answere would be pargauy and it is in one of two countries that is landlocked in south America
Paraguay
Chile, Paraguay, Brazil, Uruguay and The Falkland Islands.
Uruguay and Northern Argentina
NO! Argentina is a country in South America, next to Brazil.
Brazil and Paraguay