Hey,

Unfortunately, No. According to the eligibility criteria, the candidate must have completed 10+2 from a recognised board with 50% score for general category. Also, they have stated that a person who has completed 12th or graduation/post graduation from open education system is not eligible for the exams. Since, NIOS is an open schooling system, you aren't eligible.

Kindly check the link below to see more details:

https://www.google.com/amp/s/law.careers360.com/articles/blat/amp

Hope this helps!