Correct option is C
● Ubuntu is a popular open-source operating system based on Linux.
● Its source code is freely available for use, modification, and distribution.
● It is widely used on desktops, servers, and cloud platforms.
● Open-source operating systems allow users to study and modify the code.
● Linux-based systems are commonly used in servers and supercomputers.
● Ubuntu is known for its user-friendly interface and strong community support.
● iOS, macOS, and Windows are proprietary operating systems.
● Ubuntu is developed and maintained by Canonical Ltd.