.

So some of the best institutes that I would like to suggest you are

1. Vajiram
2. Vision ias
3. Drishti ias
4. Now insights is also in delhi .
5. Jamia milia islamia ( but here you have to go through a selection process conducted in 3 stages , it's hard)

Now what I would like to suggest you that even if you choose either of institute given above , 80 % work would have to be done by you . You have to put all yours in the preparation .

Hope it will help you .

For any further doubt , freely ask

Best wishes!