Juby, the improvement forms for the 12th board exam are now available on the official CBSE website. You can ask your brother to fill up the form and start the preparation for the improvement exam because you can only give this exam once that too in the consecutive year after you have given the 12th board exam for the first time. Your brother can give improvement exam for as many subjects he wants to improve his marks.

You can get the further details about the rules and regulations on the official website. If your brother faces any problem in applying or have any question regarding rules then you can comment below, we will help you our best.

Feel free to ask if you have any more queries. All the best!!