Dear Govind,

Yes, you can be admitted for BCA course after passing the exam from NIOS board.

There are only exceptional institutions where NIOS board result is not considered but as far as BCA is concerned, you are eligible for it on the basis of you NIOS result.

To know more about this board you can go through he link below.

https://school.careers360.com/articles/nios

I hope this answer clarifies your doubt.

Feel free to connect me in comment section for further discussions.

All the very best.