Achievers IAS Academy,Patna  best in patna upsc and bpsc

You should join the coaching as per your interest and convenience as you have not mentioned which particular location you are asking for so below I am mentioning few generic coaching names as these are very famous for the same -

Rau's IAS Study Circle Delhi, Jaipur, Bangalore

Chanakya IAS Academy Delhi

Sathya IAS Academy Chennai

Brain Tree India  Hyderabad

Elite Academy  Mumba

Astitva I.C.S.  Jaipur

ALS IAS Academy  Delhi

Brilliant Tutorials Private. Limited  Chennai

Vajiram and Ravi's IAS Academy  Delhi

Khan Study Circle  Delhi

Hope this helps!!!