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 Shreya,
NCERTs are the best books for understanding the basic concepts. For in depth knowledge and to practice more, you can refer to other important books. Go through the link below to check the list of important books for NEET UG 2019 exam

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

Good Luck!

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