Bihar Samanya Gyan 2023 + Samanya Hindi + NCERT Sar Sankalan Class 6 To 12+ BPSC Mukhya Pareeksha Solved Papers (Paper I & II 66th To 48th Sanyukt Pareeksha) (Set Of 4 Books In Hindi)(Paperback, Hindi, Dr. Manish Rannjan (IAS), Dr. Ranjit Kumar Singh, IAS, Dr. Hemant Kukreti)