Dear student,

You may get admission in any college without submitting class 12th result now, but they will ask to submit it within next few months itself.

Anyhow while taking admission, you will have to submit any proof, such as admit card to prove that you have appeared or completed class 12th. So, you'll have to keep atleast your admit card as an important document.

If you do not have any of them, I would suggest you to contact your school authority or board officials and get a document to verify that you've successfully completed your class 12th.

Hope this helps, good luck!