Which of the following is an example of an open-source operating system?

Correct option is B

Ans. (b) Sol. Linux Ubuntu is an open-source OS, meaning its source code is freely available for anyone to view, modify, and distribute. Open-source systems are cost-effective, secure, and highly customizable, which is why they are used in scientific, academic, and server environments. Related Info: Windows is proprietary (paid license) and designed for user-friendliness. macOS is Apple's proprietary OS. MS-DOS is a command-line based older OS that is mostly obsolete now.