Hello Arju
If you want to take admission in DU for undergraduate degree in B.A. then you have to fill the registration form of University of Delhi which is yet to come.
You can take admission in the basis of merit and the registration fees for the same wil be near 200 Rs.
For more information, you can go to the official website of University of Delhi.
The registration process would start near the 3rd week of May.
All the best