Hello,

Improvement examination marksheet and regular examination marksheet hodls the same value, the only difference is the marks scored in the subjects in which you have appeared in improvement exam will be given. And you can appear in all subjects for improvement examination or you can appear in one or two subjects to score the requisite percentage of marks in class 12. You will be eligible even if you appear in improvement exam in one or two subjects or appear in all subjects provided you must have 75% marks.