Hey.

The cut off for admission in government medical colleges in the previous year in Delhi under the State quota for the OBC category was a rank of 17509 and a score of 511 marks. The cut off varies each year due to various factors. And this year the cut off has been a lot higher than last year. You can expect a cut off rank in the similar range. The marks required will be a higher than this. You can use the link below for for any more details regarding the same. 

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

Best of luck