Hello Yamini, your question lacks details. But you have posted your query under Engineering section so I am assuming that you must be asking about the selection in an Engineering college. If you are selected in an Engineering college they are going to inform you via a formal selection letter, e-mail and maybe over a phone call. Plus it's your duty to check the regarding website of the college on a daily basis to check whether you are selected in that particular college or not because sometimes the selection letter is delayed.