Hi Suman

To calculate your 'Best Four' percentage, you can refer the link provided below -

https://university.careers360.com/articles/delhi-university-admissions-how-calculate-best-of-four-marks

Music will not be included in your best four percentage because it is not treated as academic/elective subject except for pursuing the course Music honours. Also, you must include the subject in your best four percentage that you wish to choose otherwise you'll face a deduction of 2.5%.

If you don't add one language and three elective subjects from the list, you may face the deduction upto 5% from your best four percentage.

The cut offs for B.A (Hons) Psychology remains high as it is the most sought after and popular course of Delhi University.
Keshav Mahavidalaya had 97% as its first cut off for this course which was closed at 94% in the eighth cut off for the previous year.

Thanks