The following are the points which are responsible for clearing Prelims:-
1. Know the syllabus properly
2. Study NCERT books from Class 6-12
3. Solve test series, mock tests, previous question papers
4. Prepare from the updated study material
5. Prepare current affairs regularly from the DNS videos which are uploaded on Rau’s IAS, YouTube channel which illustrates the important news of the day and also offers the tips & tricks to remember the important dates & information so that you can remember it for a longer duration of time.
Rau’s IAS is the best ias institute for preparing prelims as I have personally prepared from it and have also cleared Prelims exams in my first attempt.