Hii Bhanu

For preparing for NIFT+NID, you don't need coachings as such. Just go through all previous year papers and sample papers. The best way to prepare is self study with reference books from Arihant Publications.Also practice drawing skills as much as possible, try to be as creative as possible in your thinking. However, if you still want to join coaching centers in Patna you can go with either of these options. NIFTBYIITIANS, DEZINEQuest. They both are good coaching centers.

Hope this answer helps.