Hi

Delhi University can deduct up to 5% in changing of the stream while choosing the course.

The eligibility criteria is taken into consideration by calculating the best of four percentage where 1 language and 3 elective subjects are chosen. It's mandatory to include the subject as an elective subject that you wish too pursue.

If you fail to do this, you'll face a deduction of 2.5% per subject that is changing of the stream.

To know how to calculate best of four marks -

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

Thanks