Hi aspirant,
Every state has a defined eligibility criteria which is needed to be fulfilled by candidates in order to appear in the state counselling. To be eligible for the 85% state quota seats in Delhi, candidates must have passed Class 12 from any school in Delhi- NCR, affiliated with boards CBSE, ICSE or JMI.

So it would be no problem if you want to take admission in Delhi's medical college through Delhi state quota counselling even if you have a domicile certificate from West Bengal.

Hope it helps!!