Which of the following is NOT a common operating system?

The correct answer indicates that Android Studio is not a common operating system. Android Studio is actually an integrated development environment (IDE) designed for developing applications for the Android operating system. It provides tools for programming, debugging, and testing applications, but it does not function as an operating system itself.

In contrast, Windows, macOS, and Linux are all operating systems widely used on personal computers and servers. These operating systems provide the necessary software that allows users to interact with computer hardware, run applications, and perform tasks. Each of these operating systems has its own features, user interfaces, and functionalities that cater to different user needs.

Thus, the classification of Android Studio as an IDE rather than an operating system clarifies why it is the correct choice in this context. It highlights the distinction between software designed to manage hardware and provide a platform for applications (operating systems) versus software aimed at developers for application creation (IDEs).