Hello aspirant, 

So here are a few top coaching centres ,

• Brilliant Tutorials.
• Allen Institute 
• Akaash Institute 
• Bansal Classes.
• Careerpoint
• Delhi Academy of Medical Sciences (DAMS)
• Oasis Educational Services.
• Sahil Study Circle Private Ltd.
• Elite Academy.
• Naik Academy.
• Naryana.

But coaching centres like Aakaash and Allen do cost much,so you can also go to local tuitions as well.

These coaching centres only provide regularity in studies through tests and revisions.So it is what you study at personal level. 

All the best!!