Dear Aspirant,
Practical marks are optional. You need to upload your marksheet. It's not a bigger issue. Many students of your board apply and get admission in DU. I am providing you a Link which you should check out to get information about how to fill application form step by step.
Link: https://university.careers360.com/articles/how-to-fill-du-application-form
I hope this helps.
Good Luck
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