Hello

In neet 2019, 455 marks was the lowest marks that was required for st category for getting a seat in  Maulana Azad Medical College, New Delhi under Delhi state quota

You can check the same at

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

But cut off marks  keeps changing every year depending upon various factors like number of students that appeared in the exam, kind of marks obtained by them , toughness level of the examination etc.

So , you should try to get at least 500 marks  to be on the safer side

Thankyou