Hello Aspirant

To avail the benefit of the OBC quota and get admission in DU, you need to have an OBC-NCL Certificate issued by central government.

It basically means that certificate issued by any state government will not be valid, also you would have to check if your caste falls under OBC Category in the list of Central Government.

To avoid any last minute issues, check if you are eligible to get a OBC-NCL from central government by checking the central caste list.

Hope this helps