Hello ujjwal,

There are some top best coaching Institute for UPSC in India:-

•The prayas academy, mumbai.

•A.A.shah academy, Mumbai.

•Elite  academy,Mumbai.

•Rau's IAS study circle, delhi, jaipur, bangalore.

•Unique shiksha IAS academy, new delhi.

•Chanakya IAS academy, delhi.

•Sathya IAS academy, Chennai.

•Brain tree India, hyderabad.

I hope this helpful for you.

Best wishes!!