Trivia: With 22 million people, what is the largest metro area in South America?
São Paulo, Brazil
Buenos Aires, Argentina
Caracas, Venezuela
Bogota, Colombia
The correct answer is São Paulo, Brazil
So why is this answer correct? : The population of the greater São Paulo metropolitan area is 21.7 million people, making it the 12th-largest in the world. That is almost five times greater than that of Brasília, the actual capital of Brazil. Buenos Aires, the capital of Argentina, is the continent’s second-most populous metropolitan area, with nearly 15 million residents.