Hey student,

The National Institute of Open Schooling, formerly National Open School, is the board of education under the Union Government of India

The class 10th and 12th class pass certificate for NIOS is equavalent for certification and you don't need any other certificate it is valid for all the boards the state board , icse board and also cbse board.

All the best student,

Hope this helps you.

https://www.google.com/amp/s/school.careers360.com/exams/nios-class-12/amp