without test and only practice pyqs and mcq book can I get 550+ neet 2020 I read ncert.

No doubt, NCERT Textbooks of class 11 and 12 are great for preparation. But these are not enough to score 550+ marks in Neet. Biology is the most important subject so you should give it importance and practice from other books. Like Truman, Objective Biology by Dinesh etc. Along with NCERTs, you must also solve previous year exam papers, many questions are directly repeated. You should give mock tests to understand how much you are prepared.

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