hello,

NIOS students are eligible to appear in NEET examination , the minimum eligibilioty criteria to appear for NEET examination is that the candidate must have passed their 10+2 with at least 50 percent marks where physics chemistry  and biology are mandatory subjects, the candidate must have passed in English subject in their class 12th.                                                                                                    NIOS is a recognized university so if you have passed your class 12th from NIOS then you are eligible for NEET exam.

hope this helps, all the best