Hi Nina,

The link for merit based and entrance examination based admissions is same, which is, 

admission.du.ac.in 

But I must inform you that registrations haven't started yet and would begin in a day or two from now. If you have any more queries then feel free to ask. 

Hey, Nina

If you want to register yourself for the UG admission you can kindly go to the main site of University of Delhi where you'll find the option for registration. 

The site is: du.ac.in

You can check it there! Hope it helps you, good luck!