HI Nitish,

First of all, good luck for your preparation.

According to me, IAS Mantra is a pretty good institute. There are other institutes also, but I think it does not matter where you study, it matters how hard you work. At the end of the day, it is you who have to study and work hard to crack this exam.

here is the lit of the institutes in patna

• ALS IAS(Alternative Coaching System),patna
• Chankya IAS Academy,Patna
• Pragya Civil Services,Patna
• Sarvodya Civil Services,Patna
• Achievers IAS Academy,Patna
• Dheya IAS Coaching,Patna

good luck