बिहार के कितने जिलों को अलग कर झारखण्ड राज्य का निर्माण किया गया था ? - Jharkhand state was carved out of how many districts of Bihar? - Bihar Ke Kitne Zilon Ko Alag Kar Jharkhand Rajya Ka Nirmann Kiya Gaya Tha ? Bihar Gk in hindi, Geographical Structure 17 question answers in hindi pdf 18 questions in hindi, Know About 16 Bihar Gk online test Bihar Gk notes in hindi quiz book 19