Bsc in du merit based or exam based
As you want to know du admission process. Du give admission based on your board exam result of 12th class and also give admission on entrance exam.
The cut off list for the board result is very high in some colleges. So to get admission in those colleges students try to give entrance exam for admission.
The entrance exam cut off is different from the merit cut off of Delhi university colleges.
But entrance exam is only applicable for 9 courses approx most of admission is based on merit score.
But according to news from this year the entrance exam will be conduct for all courses.
Hey
To get admission in colleges of Delhi University for bsc. There is no entrance exam. It is purely based upon your marks in class 12th. The top 4 subjects are included in the percentage that is considered in admission. These may differ according to the subject you would pursue bsc in like maths honours, chemistry honours , etc.
hope this is helpful to you.