Hi Misha

For improvement in class XII board exams, you can either appear in one subject (in which you think you have less scores and you can score better in the improvement attempt) or you can appear in all five subjects, if you think you will be able to score 75% as required for admissions.

All the best!

You need to appear for all the subjects in improvement exam. The application form is expected in the last week of September or First week of October.