Which of the following is an example of the public sector?

The police service is a clear example of the public sector because it is an organization that is owned and operated by the government. Public sector entities exist to provide services that are beneficial to society as a whole and are typically funded through taxation. In the case of a police service, its primary function is to maintain law and order, protect citizens, and ensure public safety, which are fundamental responsibilities of the government.

In contrast, a supermarket, a private hospital, and a railway station owned by a private company are all examples of the private sector. They are profit-oriented businesses created to provide goods or services to customers, primarily to generate revenue rather than to serve the public interest directly. The distinction between the public and private sectors is important in understanding how different organizations operate within an economy, and recognizing that the public sector's aim is typically centered around the welfare and needs of the community at large.