which book should I prefer. to cracking nda exam

candidate if you want to prepare for maths best book is rs Agarwal for nda( just for mathematics) and for gat prefer previous year papers and check the pattern and go through NDA book by Pathfinder the latest one and to secure good marks be prepared for following subjects you will pass that's for sure mathematics 300M physics 100M chemistry 80M biology 16M and finally English 200 M .... get prepared for just these subjects and you will pass for sure