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Which of the following is an operating system? I. Ubuntu I | UPSC Topper Notes NCERT

Which of the following is an operating system?

I. Ubuntu

II. Linux

III.Unix

निम्नलिखित में से कौन सा एक ऑपरेटिंग सिस्टम है?

I. उबुन्तू

II. लिनेक्स

III.यूनिक्स