Hi Nischitha,
I understand that you have mistakenly entered an incorrect student category while filling up the application form for some institution and so to answer your question, you need to first check if there is any correction window available to rectify your mistake.
If there is no correction window then I advise that you address this matter to the concerned authorities via post or through mail along with mentioning the proper details and stating the matter and request them to solve the discrepancy at the earliest.
BEST WISHES!
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