NCERT books are the base on which the 12th board exams are conducted. Now to convert that entire NCERT into 45 MCQs to test the subject knowledge and understanding of the Candidate's adaptability of subject matter, NCERT is not enough. That is the reason, questions are also asked out of NCERT. To complement the  questions asked and to be ready with the kind of questions thrown at you, it is always good to keep yourself trained with the help of more books.

Physics Best Books:

NCERT Physics Class XI & Class XII
Concepts of Physics by H. C. Verma
Objective Physics By DC Pandey
Fundamentals of Physics by Halliday, Resnick and Walker
Fundamental Physics by Pradeep
Problems in General Physics by IE Irodov

Chemistry Best Books:

NCERT Chemistry textbooks for Class XI and XII
Physical Chemistry by OP Tandon
ABC of Chemistry for Classes 11 and 12 by Modern
Concise Inorganic Chemistry by JD Lee
Dinesh Chemistry Guide
Practise books by VK Jaiswal, MS Chauhan and N Awasthi

Biology Best Books:

NCERT Biology Class XI and Class XII textbooks
Biology Vol 1 and Vol 2 by Trueman
Objective Biology by Dinesh
Objective Botany by Ansari
Pradeep Guide on Biology
GR Bathla publications for Biology