Hello Munshid,

National Institute of Open Schooling is approved by the Human Resource and Development ministry of Government of India with a motion that was released in the Indian Gazette on 20 September 1990. Certificates from NIOS are accepted for entrance in most colleges and Universities in India. NIOS Board students have the same recognition and rights as students of any other board in India. However, there are certain colleges in Chennai that do not accept NIOS 10+2 degrees due to a discord between the colleges' and the board's syllabus. Rest be assured, all government universities accept NIOS certificates in India.

Hope this helps! Good luck!