Dear Student,
Yes, with all these it is possible to score 500+. It is just that you have to be clear with all the topics and concepts which has more weightage and have high chances to come in exam. And also solving previous year will help you a lot and 21 year previous year questions are more than enough to solve.
Also for biology, you must be very clear with ncert. Revise it at least 5-6 times. For chemistry, organic portion must be clear with concepts and mechanisms of the reactions as well as named reactions. For inorganic portion, same thing (concepts and mechanisms) as well as periodic table and important elements of it. For physical chemistry, not only memorising formulas are enough, you must be able to solve the numericals also.
For more preparation tips and tricks, you can visit :- https://medicine.careers360.com/articles/neet-preparation-tips
You can also join Careers360 NEET crash course. You can access all the preparation material for NEET on the given link below :- https://learn.careers360.com/medical/neet-preparation-material/
Happy Learning!
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