In 2018, 82 questions (out of 90 questions in Biology) had come from NCERT. And out of remaining 8 questions, 3-4 questions could be solved if a candidate has thoroughly understood each and every line of NCERT. This means, by studying NCERT Biology a candidate can secure 340-344 marks. However its not that easy as it seems. One needs constant practise.

Solve last 10 years' questions.

Solve NCERT Exemplar questions.

MTG Fingertips is a good book for MCQ practise.

Thank You

Best Of Luck

Hello,Dear

Well,definetly ncert is most important 80% question will be directly from ncert either from excercise or theory part so you can score so good by using only ncert and 20% questions are tricky and of deep thinking for that you have to use some advance level book.hope this will help you

all the best!