Yes, you can. There will be an appeal fee for each subject.

If you are a school candidate, you may appeal for a review of results and make payment through your school within five working days after the results are released. The school must submit your appeal to SEAB by the stipulated closing date.

If you are a private candidate, you may apply to appeal for a review of your GCE-Level examination results online by logging into SEAB's Candidates Portal, no later than 5 working days after the official release of the results. In Candidates Portal, look for "Making Requests", and click on "Appeal for Review of Results". Late applications will not be considered. Please ensure that the appeal fee(s) are paid by the stipulated deadline, as applications will not be processed if payment is not received in time.