First of all everything, use NCERT books for all the main subjects that is Physics, Chemistry and Mathematics. The questions asked in exams are a little bit easier than JEE so dont get confused while choosing the appropriate books. You can rely on NCERT for chemistry and for practice solve books like MTG CHAMPION, maybe HC VERMA for Physics or else Marvel will also do, and some practice problems for MATHS.

Best wishes. Thankyou.