Which one of the following is not an operating system

Which one of the following is not an operating system?

  1. MS-Windows
  2. Linux
  3. Ubuntu
  4. MS-Excel
  • Answer: The correct option is D
  • Explanation:

    MS-Windows is an operating system developed by Microsoft. Linux is a Unix-like operating system kernel that serves as the foundation for various Linux distributions. Ubuntu is a popular Linux distribution based on Debian. It includes the Linux kernel and a collection of software applications, making it a complete operating system.

    MS-Excel is not an operating system. It is a spreadsheet software application developed by Microsoft.