Hi, It is bit unclear for me to answer but, you can re-appear for improvement exam in CBSE board. You can also re-apply for exams the application procedure depends upon your board. If nothing permits you can apply for NIOS board and select whichever subject you want as per your standard. Coming to CBSE board The forms can be collected from Syndicate Bank branches throughout Delhi and Regional Offices of CBSE for other regions. Results will be out on the official website. For form the fees is 10 INR and for per subject it is 200. You can only appear for those subjects which were attempted by you previously. No practical exams are included only theory. This whole procedure can be done online too. Hope this helps. If you still have doubt feel free to comment.