Yes, you will be eligible for JEE Main and JEE Advanced after completing Class 12th through NIOS with Physics, Chemistry, Mathematics, and Biology (PCMB) in 2025. Here's a concise overview:

1. JEE Main Eligibility:

• Educational Qualification: Pass Class 12 or equivalent with PCM subjects from a recognized board like NIOS.

• Year of Appearance: Candidates who will appear for their Class 12 examination in 2025 are eligible for JEE Main 2025.

2. JEE Advanced Eligibility:

• Performance in JEE Main: Be among the top 2,50,000 candidates in JEE Main.

• Number of Attempts: A candidate can attempt JEE Advanced a maximum of two times in two consecutive years.

• Year of Appearance in Class 12: Candidates should have appeared for the Class XII (or equivalent) examination for the first time in either 2024 or 2025 with Physics, Chemistry, and Mathematics as compulsory subjects. vedantu.com (https://jeeadv.ac.in/eligibility.html?utm_source=chatgpt.com)

3. JoSAA Counseling Eligibility:

• Subjects Requirement: Must have Physics, Chemistry, and Mathematics in Class 12.

• Aggregate Marks: Achieve a minimum of 75% aggregate marks in Class 12 for admission to IITs, NITs, IIITs, and other GFTIs. For SC, ST, and PwD candidates, the required aggregate is 65%.

4. NIOS Recognition:

• NIOS is a recognized board, and its certificates are valid for JEE and subsequent admissions.

5. Additional Considerations:

• Ensure all required subjects are completed in the same examination sitting to meet eligibility criteria.

• Stay updated with official notifications from NTA and JoSAA for any changes in eligibility criteria.

Conclusion: By reappearing for Class 12 through NIOS with PCMB in 2025, you align with the eligibility requirements for JEE Main, JEE Advanced, and JoSAA counseling. Diligent preparation and adherence to application timelines will be crucial for your success.