I have gotten 76.20% marks in 12 rbse with biology & belongs to OBC.I want addmission in DU for Bsc.in which course & college in DU?
You should calculate your best four marks ( 3 core subjects and 1 language) in 12th board exams.
Also, you haven't mentioned which course in B.sc, you are seeking admission because cut off varies from course to course.
For colleges, you can calculate your best four marks and then check previous year cut offs for B.sc courses in different colleges. You can use the following link for colleges.
https://www.careers360.com/college-predictor
Hope this helps, good luck!