can i get admission in du at bsc hons. in bsc course by 90% in best four subjects
Refer to the link below to get the last year cut off for different courses :
http://www.du.ac.in/du/index.php?page=cut-off-2017
But yes, you can get admission in B.Sc in University of Delhi in later lists if seats are not occupied in the initial lists.
Good Luck