Hello Aadya, you can appear for those subjects only for which you have enrolled in your previous exam. Means those subjects you allready gave, only those subjects you can select.

I hope it will help.

Thanks.

Dear aspirant,
There is a good chance for you ,
Cbse class students can give improvement exams.
You have to give improvement exam for all the five subjects to appear in the engineering exam

The only criteria is the candidates has the pass all the exams the student failing in any of the subject is not elligible for improvement exam

To Know about the whole procedure visit the official site
You might be wondering that the exam would have new syllabus but don't worry you have the study material for it too.
To know more do visit the cbse official site.
Comment down below for more information.
I hope this helps.

Hi Adya!

You can give an improvement in all the five subjects. You also have a choice to give an improvement in anyone. But above all the improvement should be given only in the successive year of passing your examination. You cannot appear for improvement in one exam and additional subject examination simultaneously. All the best!