1) The document compares every question from the 2021 NEET biology exam to its source in the NCERT textbooks.
2) It finds that all questions in the botany and zoology sections were directly sourced from topics and pages in Class 11th and 12th NCERT textbooks.
3) This supports the argument that focusing on thoroughly understanding the NCERT is effective for NEET preparation, since the exam is based primarily on these textbooks.