Hello Alok Singh

I would suggest you that you don't need to study for hours. Whatever you study, study it with full of concentration which will help you for not only in NEET but other competitive exams too. Study the concepts in depth, don't read superficially.
Try to clock 100 hours a week. That is the ideal time or try making atleast 6 hours a day, i.e 50 hours a week, and even if it's little time try to grasp concepts and revise.
Maintain your health. Sleep is crucial, else you'll get exhausted before time.
Stay motivated.
Revisions are the most important
Make your own notes, keep reading it again and again as hand written notes are well remembered than printed material.
Learn and understand NCERT thoroughly. NCERTs are mandatory to have, refer the rest of the books and find out which one suits you.
In the end it doesn't depend upon which book is better but how good can you understand the concepts
Also, for the general knowledge subscribe magazines, they will be useful.

Kindly visit the mentioned below pages for more information.

https://medicine.careers360.com/articles/neet-2019

https://medicine.careers360.com/articles/neet-chapter-wise-weightage-and-important-topics

Hope it helps you.