Hello!

NIOS is a board which allows you to have different subjects. You should write eight subjects out of which atleast five you should clear. You will have the choice for opting subjects for example if you don't want mathematics you can opt for physical education. Hence you can choose the subjects you want to. And this NIOS syllabus will be much similar to that of CBSE syllabus. ALL THE BEST. Hope the answer was helpful.

Thank You