You are definitely eligible for this quota.

But with 506 marks, I am sorry to say but this year you won't be getting any seat through this quota. You should have got atleast 550+ marks as number of seats are very few and the cutt off has been high this year

Hello Jyoti,

As per 2018's data, the least marks which secured a seat in government medical colleges was 511 for OBC candidates under state quota and in 2017, it was 510. There is a slight chance for you to fetch a seat in Govt. Medical Colleges in Delhi. To get a seat in govt. colleges under all india quota, the score needs to be much higher, around 600. 

Thanks, hope this helps.