Option 1: United States of America - The United States of America is the most populous country after China and India. It is home to a diverse population of over 300 million people. The country`s large population can be attributed to factors such as high birth rates, immigration, and a relatively high life expectancy. The United States has experienced significant population growth over the years and continues to be a popular destination for immigrants from around the world.
Option 2: Brazil - Brazil is the largest country in South America and has a population of over 200 million people. While it is the fifth most populous country in the world, it is not more populous than the United States after China and India.
Option 3: Argentina - Argentina is the eighth largest country in the world and has a population of around 45 million. It is not more populous than the United States after China and India.
Option 4: Indonesia - Indonesia is the fourth most populous country in the world and has a population of over 270 million people. While it has a large population, it is not more populous than the United States after China and India.
Therefore, the correct answer is option 1, United States of America.