बिहार के जनजातीय क्षेत्र के लिए झारखण्ड शब्द का प्रयोग पहली बार हुआ- - For the first time the word Jharkhand was used for the tribal area of Bihar. - Bihar Ke Janjatiya Shetra Ke Liye Jharkhand Shabd Ka Prayog Pehli Baar Hua - Bihar Gk in hindi, Bihar Medieval History Quiz 13th Satabdi Me question answers in hindi pdf 14th Satabdi Me questions in hindi, Know About 12th Satabdi Me Bihar Gk online test Bihar Gk notes in hindi quiz book 15th Satabdi Me