Which of the following is NOT a category of industry?

The correct answer, indicating which is not a category of industry, is the Quinary Sector. The traditional classifications of industry are segmented into the primary, secondary, and tertiary sectors.

The primary sector involves the extraction and harvesting of natural resources, such as agriculture and mining. The secondary sector focuses on manufacturing and processing, transforming raw materials into finished products. The tertiary sector encompasses services, ranging from retail to healthcare and education.

While the quinary sector is often mentioned in discussions of economic activities, it is generally regarded as a subset of the tertiary sector rather than a distinct category. This sector includes advanced services such as healthcare, education, and scientific research, focusing on knowledge and experience-based services. However, it does not stand alone in the traditional breakdown of industrial classifications.

Therefore, in the context of the well-recognized categories of industry, the Quinary Sector differs from the established three sectors, making it the answer to this question. Understanding these classifications helps clarify the roles and relationships of different sectors in the economy.