Hey.

The cut off for admission in government colleges in Delhi under the State quota for the OBC category in the previous year 2018 was a rank of 17509 and  a score of 511 marks. The cut off changes each year due to several factors like level of difficulty or level of Competition etc. This year as the paper was easier the cut off based on marks will be higher than before. Hence you'd require a rank under this for a fair chance of admission here. You can use the link below to check the previous year trends. 

https://medicine.careers360.com/articles/neet-cutoff-du/amp

Best of luck.