RAILWAY GROUP D ONLINE EXAM Book (Hindi) is published by Kiran Prakashan. It is available in Hindi medium. Best Guide Book cum Reference Book for Railway / RRB Exam Preparation. Consist of Previous Years Solved Question Papers. RAILWAY GROUP ‘D’ CBT ONLINE EXAM PRACTICE WORK BOOK (HINDI). Useful for recruitment exam to the post of : Trackman, Helpe Gr-2, Porte, Gangman, Gateman, Khalasi, Attendant & Other Group D Exams conducted by different Railway Zones. 50 Sets.