You should go Spartan defence Academy and after demo class feel the difference

Hello Anil,

There are several coachings in Lucknow as is it  considered as a hub of Defence exams you can refer here https://www.sulekha.com/nda-coaching/lucknow

But some of the best coaching centers are,

Centurion Academy(You can search on google and they have a youtube channel too)

Warriors defence Academy

Best of luck with NDA.