Good luck, future Cadre.
The secret weapon of toppers is the NCTB (National Curriculum and Textbook Board) books. Focus on: Class 9-10 books. History & Social Science: Class 6-10. Bangla Literature: Class 9-10 "Bangla Sahitya." Math: Class 8, 9, and 10 General Math. Analyze Previous Years bcs preparation for beginners