Dear Anik,

Focus on concepts from NCERT books and after that take help of following books for practise.

Physics

1.)H.C Verma :
2.)I.E Irodov :
3.)Resnick & Halliday

Maths

1.)Hall & Knight(Algebra)
2.)S.L Loney (coordinate,Trignometry,Vector)
3.)R.D Sharma
4.) M.L Khanna 
5.) Tata Mc.Graw Hill

Chemistry

O.P Tondon: For organic Morrison & Boyd,,I.L Finar- Vol.1. For inorganic, J.D Lee. For Physical, Mcmurray & Fay

Best Of luck

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