Achin trust me and apply for locus correspondence course you can get info on
www.locuseducation.org for theory + problems
also apply for vidya mandir classes(delhi) correspondence material and use it just for problems and make sure you are doing there objective booklets
after this use these books
physics - HC Verma Vol. 1 + Vol.2
maths - take any book for good problems
for physics and maths use these books for problems and only start them after finishing locus material
for chem - physical - locus is awesome
inorganic - NCERT + locus
organic - Morrison boyd+ locus
Must take - 28 years JEE topic wise papers and do it after complition of each topic don't just leave it for the last
i believe its the best combination for JEE
if you have any doubt nudge me
stay in touch