If you secure a seat in the first phase of counseling but attempt the second phase hoping for a better college and unfortunately don't get a seat allotted in the second phase, you will generally need to report to the college allotted to you in the first phase.

This is

You most likely will still be considered for passing based on the information you provided.

The CHSE Odisha board requires a minimum of 33% marks in each subject (including theory and practical) and an overall aggregate of 33% to pass class 12 exams.Since your failure is in the optional subject,

Hello aspirant

Yes you can appear for biology exam from NIOS then you can appear for neet if  you fulfill the eligibility criteria for neet .

NIOS is National Institute of Open Schooling.  It is government recognized and NIOS marks are accepted in neet .

Make sure you must get

absolutely yes , because you would be considered a new admission

Hello Aspirants,

Datesheet for the 2024 CBSE Board Exam: On January 4, the Central Board of Secondary Education made public the updated schedule for the 2024 CBSE Board Exam. On December 12, 2023, the Board had already published a datesheet.
The schools administer the final examinations for grades 1–8, 9–11,

Hello aspirant,

Indeed, after completing your tenth grade, you are free to switch schools and boards. Since the school administration does not accept students for the tenth grade, you are unable to alter it after your ninth grade. However, you can easily transfer schools or boards if you're willing to

Hello aspirant,

Hope you are doing great.

So coming to your question, NO, it is not possible to change the subject in class 12 in the CBSE Board, when your 11th subjects are different from the 12th. You cannot take mathematics in your 12th grade, when you have already chosen