Which of the following is an open source operating system?

The correct answer is (b) Linux.
Explanation:
● Linux is an open-source operating system, which means its source code is freely available for anyone to view, modify, and distribute.
● It is widely used in servers, security systems, cloud platforms, and supercomputers.
● Popular Linux distributions include Ubuntu, Fedora, Red Hat, and Kali Linux.
Information Booster:

● Open source software can be customised by users.

● Linux supports multitasking and multi-user operations.

● Most web servers run on Linux due to high speed and security.

● Android OS is based on the Linux kernel.

● Windows, Unix, and MacOS are proprietary systems.
Additional Information:

● (a) MS Windows – A proprietary OS developed by Microsoft; source code not open.

● (c) Unix – Earlier open design but now mostly commercial; not fully open source.

● (d) MacOS – Proprietary OS by Apple; closed source platform.