पुराने बिहार की कितने प्रतिशत जमीन लेकर झारखण्ड राज्य बना है ? - Jharkhand state was formed by taking what percentage of the land of old Bihar? - Purane Bihar Ki Kitne Pratishat Jamin Lekar Jharkhand Rajya Banaa Hai ? Bihar Gk in hindi, Geographical Structure 45.85th question answers in hindi pdf 44.85th questions in hindi, Know About 40.58th Bihar Gk online test Bihar Gk notes in hindi quiz book 52.68th