This book, "100 Landmark Judgment 2021" is third in the series of 100 Landmark Judgments of the Year” book. The series has been helpful to law students, advocates, teachers and judicial officers for referring to all the important judgment of the year which has changed the law or has capacity to change the law. The book is ideal for the preparing for competitive exams such as PCS-J, PCS, UPSC, APO etc. It is a collection of various landmark judgments of the Supreme Court and other High Courts keeping in mind the preliminary examination of Judicial Services and APO. This collection of landmark judgment and MCQ’s will prove very useful for future examinations.