Hey Vihaan ,
Greetings!

Yes , you can try getting admission for different streams of B.Sc in Delhi University . However , Delhi Univeristy doesn't conduct any entrance exam for candidates seeking admission in B.Sc programs rather they intake students by class 12 board reults.

You just have to fill an application form by following this link :-
https://ug.du.ac.in/app2k18/
You can check previous year cut off for all the courses by following this link :-
http://www.du.ac.in/du/index.php?page=cut-off-2017

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Hope this will help . Good Luck ! You can reply to this comment if you have any further queries , I will be happy to help .