Hello,


The Best of Four subjects need to include the following

One language (Core/Elective/Functional)
One subject in which admission is sought  A candidate needs to include the subject in Best of Four, in for the Honours programme in which admission is being sought, otherwise a disadvantage of 2.5% will be applicable to the calculates Best of Four percentage
Any two other academic/elective subjects as per List A  If a candidate doesnt include the subject as enlisted in List A, then a disadvantage of 2.5% will be imposed to the Best of Four calculated
List A includes the following disciplines offered by the University of Delhi for admissions to the three-year undergraduate programmes must be treated as Academic/Elective subjects. All the disciplines subjects must have at least 70% component of theory and 30% component of practical. Theory component doesnt include internal assessments or continuous evaluation

Go Through the link for more information :

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

I hope this helps.