Hi Shaan,

Yes you are eligible for taking admission in IIb and also you can get a chance to give the entrance exams after 12th standard.

Thank you.Good luck.

hi, since you have done your class 10 from cbse and are currently doing 12th from nios you are eligible. 

the eligibility criteria is 

• Prescribed qualification is 10+2 from a recognized board by attaining 50% marks in aggregate. Also, candidates must passed English in the qualifying examination. 

for more details you can check https://law.careers360.com/articles/ipucet-law-eligibility-criteria 

best of luck!