No , you cannot apply for multiple subjects as a private candidate if you have a compartment in one subject. You can only apply for the subject in which you have failed.

Your passing year will be the year in which you clear the compartment exam. For example, if you appeared for Class 12 in 2023 and got a compartment in Mathematics, and you clear it in 2024, your passing year will be 2024.

Your marksheet will include all subjects. The marks for the subjects you passed in the previous year will remain the same, and the marks for the compartment subject will be added in the new marksheet

I hope this information helps.

Yes, you can repeat class 12 as private candidate in all subjects and from any board if you want to improve your score. However, you will have to check with the board if they allow students to repeat class 12 in case of any board . It is advisable to check with your school and the board to understand their policies and procedures for repeating class 12.

The marksheet you get after successful completion of your board exam is of the same year in which you get admission but on result improvement is written.