greetings kunal,

whichever board you have passed out from, calculate the best four marks(include english, it's compulsory).

you can take admission in delhi university on the basis of your 12th best four marks

pls check previous year cut-off to check which courses can you seek admission in according to your best of four:

http://www.du.ac.in/cut-off.html

hope this helps.

good luck