निम्नलिखित में से कौन सा ऑ� – McqOptions

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1.	निम्नलिखित में से कौन सा ऑपरेटिंग सिस्टम IBM द्वारा निर्मित है?
A.	ओएस -2
B.	विंडोज
C.	डॉस
D.	यूनिक्स
Answer» B. विंडोज

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