Below is the list of some top coaching institutes of India for cse prepration
1.Rau's IAS study circle
2. Chanakya IAS academy
3. Raj IAS academy
4. Vijayram and Ravi
5. Elite academy
As I provide you the list of top coaching institutes , but as I suggest you 1st to talk to old students of the coaching to get the clear picture of internal working of center
Also check the past result of coaching and the qualifications of teachers.
Also check that fee structure is acceptable to you.
Hope this information helps you