Hello Aspirant,

Yes, you are eligible for the NIOS exam even after graduation. The suitability norms are very simple.

• The aspirants should have attained the age of 15, by the stipulated time given by the NIOS.
• To give a 10+2 examination, you should have a 10th standard passing certificate from an identified institution.
• Passport-sized photo, address proof document, DOB proof document are other necessities.

You can opt for five compulsory subjects and one or two linguistic subjects.

You can know more about these courses here

https://school.careers360.com/exams/nios-class-12

I hope it helps.

Thank you.