Ncert the most important book for all the subjects you just need to learn thoroughly all the books of NCERT of all the subjects .

Other than that for mcqs ... NCERT fingertips MCQ book for biology , chemistry , physics or uh can also follow this books mentioned below

Biology - Dinesh 

Physics - USS, Arihant 

Chemistry - USS 

Hope uh get it all the best for exams

Hello Arjun
NCERTs are the best books for understanding of basic concepts. You should also refer to other important books for in depth knowledge. Go through the link below to check the list of important books for NEET UG preparation

 https://medicine.careers360.com/articles/best-books-for-neet

Good Luck!

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