Computer MCQsWhich of the following is/ are operating systems? Posted on March 24, 2021 by Rana TahirA. Windows B. Unix C. OS/2 D. All of theseShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)