Hello Kartikey,

Yes you are eligible to apply for National Eligibility cum Entrance Test (NEET) whether you passed 12th class from NIOS Or board. You should be from PCB background. Other eligibility requirements for NEET are given below :-

• Candidates who are 17 years or older on the date of admission are eligible to apply for NEET.
• Candidate must have passed 10+2 with physics, chemistry and biology as mandatory subjects and should have minimum aggregate of 50%(For OBC/SC/ST it is 40%).

As of know NEET 2020 has been postponed till further notice due to the outbreak of COVID-19. NEET Correction window is reopened for registered candidates till April 14th 5:00 pm.

For more information about NEET you should read this article .

Good Luck!!