Hello Naman!.

For taking admission in B.Com(pass) or B.Com(Hons), best four subjects should include one language (either Hindi or English) plus three elective subjects.Yes, you can include music as an elective subject but since it is not a subject listed in list C1 or C2(read page no.89–94 of information bulletin for undergraduate admissions of DU)2.5% marks will be deducted from your aggregate percentage of best four.

Hope this will help you.

Thanks!