RBD Railway Science + G.K. Chapterwise Previous Year Questions by Khan Sir(Hindi Medium)

Railway Science + G.K. by Khan Sir (Bihar Kesari) is a comprehensive guide published by RBD Publication and Khan Global Studies. The book includes 15,000+ questions from the last 25 years, organized chapterwise along with practice sets for complete exam preparation.
It covers all major Railway exams such as NTPC, Group D, RPF, ALP, and RRB JE, providing in-depth coverage of General Science and General Knowledge topics. Each chapter is designed to help aspirants strengthen conceptual understanding and improve accuracy through repeated practice. This book is an ideal resource for candidates preparing for Indian Railways and other competitive government exams