First and Foremost: – NCERT Text Books & NCERT Exemplar for Class XI & XII.
Other than NCERT (after completing NCERT) you can go for following books-
………..BIOLOGY ……
⬅️ -: MTG Ncert at your Fingertips
⬅️ -: Truman’s Objective Biology
………..CHEMISTRY ……………..
⬅️ -: MTG Ncert at your Fingertips
⬅️ -: Organic & Inorganic Chemistry By O. P. Tendon
➡️ -: Physical Chemistry By P. Bahadur
……..……PHYSICS ..………..
➡️ -: Concepts Of Physics By HC Verma
➡️ -: Objective Physics By D. C. Pandey