IITs take the admission through JEE Advance. For the exam preparation I would suggest you first NCERT books as it will help you to clear your basic concept. The other books you can prefer-
Physics:
Concept of Physics by H.C. VermaFundamentals of Physics by DC PandeyChemistry:
Numerical problems in Chemistry by P. Bahadur O.P. Tandon J.D. Lee.Mathematics: Mathematics by R.D. SharmaTrigonometry by S.L. Loney Algebra by Hall & Knight
Good luck!
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