KVS Exam Question : Linux is an example of : लिनक्स किसका उदाहरण है?

Question : Linux is an example of : लिनक्स किसका उदाहरण है?

(a) Multimedia Software/मल्टीमीडिया सॉफ्टवेयर

(b) Library Software/लाइब्रेरी सॉफ्टवेयर

(c) System Software/सिस्टम सॉफ्टवेयर

(d) Content Management Software कनटेन्ट मनेजमेन्ट सॉफ्टवेयर

I have done distance education library science can I apply for the post of Librarian of KVS or KVS

As we all know, IGNOU is a Distance Education University, but it is also university run by the Central Government. And I believe that IGNOU certificate is more valuable than any other distance education university like Sikkim Manipal, Mahatma Gandhi, etc.