If I don't get seat through icar ug 2019..then what should I do..if I don't want to drop this year??

Dear Divyani, between the level of competition and no.of seats available, not everyone can really secure a seat. That means no way can you give up. You can reappear next year. But if you do not want to take a gap year, may be you can join some college which doesnt burden your preparation for a year but continue preparing for ICAR UG. Like a BA Psychology or Arts which doesnt take away your time for preparation.