What is the smallest country in South America by land area?

What is the largest country in the Commonwealth by area? Which country is the largest in the Arab world by area? What is the smallest country in the world, both in terms of population and land area? Which of the following countries is an independent city-state with a land area of approximately 2.02 km²? What is the smallest country in Europe by land area, excluding Vatican City? What is the smallest country in Africa by land area? What is the smallest country in Asia by land area? What is the smallest country in Oceania by land area?