Helllo gopi

I hope you are doing good . With reference to your query , I would like to share their are various number of top insititues in india whcich provides coaching for ifs exam and have good success rate . Some of names of coaching centres are as follow:-

1.Institute of Mathematical Sciences (IMS)

2. Classic IAS Academy

3.Chanakya IAS Academy, South Delhi

4. Classic IAS academy

Hope you found this answer helpful. Good luck for your future