Hello Shreyansi,

Yes, you can become eligible for JEE Mains by improving your marks through the NIOS (National Institute of Open Schooling) on-demand exams. Here's how it works:

NIOS On-Demand Exam and TOC

• NIOS On-Demand Exam : You can choose to appear for up to 3 subjects in the NIOS on-demand exams.
• Transfer of Credit (TOC) : You can transfer up to 2 subjects from your CBSE marksheet to NIOS, provided the subjects are equivalent in NIOS.

Eligibility for JEE Mains

• 75% Criteria : For general category students, the JEE Mains eligibility criteria require either 75% in the board exam or to be in the top 20 percentile of your respective board.
• Using NIOS : If you meet the 75% aggregate after including your NIOS results and the TOC subjects, you will be eligible for JEE Mains.

Important Points to Consider

• Subject Selection : Choose the subjects wisely to ensure that you meet the aggregate 75% requirement.
• Timing : Ensure that you complete the NIOS exams and get the results in time for JEE Mains registration and counseling.
• Verification : During counseling, your new marksheet from NIOS, along with your CBSE marksheet, will be considered.

If you follow this route and improve your percentage to meet the criteria, you should be eligible for JEE Mains.

Hope it helps !