Hey, four best of five means the four subjects in which you scored well and you have to leave the fifth subject in which you have scored the lowest which functional English in your case.

So your four best out of five percentage is 97.5 % here I have excluded your functional English marks and calculate percentage from the total of 400 marks.

Yes, you will have to see the cutoff percentage in the list and then apply and there is no issue even if you 're not from Delhi.

For knowing about the best DU college please visit the link below:

https://university.careers360.com/articles/du-colleges

Hope this helps.

for further doubt please ask in comments.