Which of the following is NOT a type of Operating System?

Correct option is D

The correct answer is (d) Mac Solaris
Explanation:
● Solaris is a Unix-based OS by Oracle. Mac (macOS) is by Apple. There is no legitimate "Mac Solaris."
● Ubuntu and Fedora are popular Linux-based Operating Systems.
Information Booster:
● Windows is a proprietary OS by Microsoft.
● Linux is an open-source OS kernel.
Additional Knowledge:
● Mobile OS includes Android and iOS.