The world's economies can be divided into four main categories according to their annual per-capita income levels. Which one of the following is NOT one of the categories?

Question

Quizplus · Accepted Answer

The world's economies are typically divided into four main income categories: low-income, lower middle-income, upper middle-income, and high-income. The option "middle-income" is not used as a distinct category by major economic classification systems like the World Bank's, making it the incorrect choice.

The World's Economies Can Be Divided into Four Main Categories