Hey,
The best four subjects vary for different courses. So you must be sure as to what course you want to opt.
Generally,the best four subjects include one language,one main subject(that you wish to pursue) and two other subjects in which you have scored high which may include additional subject. Your best four differs for every course.
For more information follow the link given below:
https://university.careers360.com/articles/delhi-university-admissions-how-calculate-best-of-four-marks
Hope this helps.
Good luck.

DU Delhi

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