Hello mudit.

Yes, There is a defense quota in delhi university. They have divided this quota in 9  different categories . So before applying you have to figure out that from which category you belong.

Later on you need to get a certificate from sena bhawan for you category . For this certificate your parents have to go there and apply for you.

Things you must carry there are:

• dob certificate
• residental proof
• other documents including marksheet , aadhar and some important stuff

Hope it helps!