Which of the following regions is NOT one of the five primary administrative regions?

The Midwestern region is commonly recognized as one of the primary administrative regions in various organizational contexts, including business and educational frameworks. The five primary administrative regions typically include the Western, Mountain Plains, North Central, Southern, and Eastern regions.

In this context, the Midwestern region, although often used colloquially to describe a particular geographical and cultural area in the United States, does not align with the specific categorization of administrative regions used in the question. Instead, the North Central region can be synonymous with the Midwestern region, reinforcing that neither term refers to an officially recognized administrative region in this instance. Recognizing the distinction is essential for understanding regional classifications in various administrative and organizational settings.