सत्रहवीं शताब्दी में बिहार में कहाँ सोने की खानों के होने का उल्लेख किया गया है ? - Where is the mention of gold mines in Bihar in the seventeenth century? - Satrahvee Satabdi Me Bihar Me Kahan Sone Ki Khanon Ke Hone Ka Ullekh Kiya Gaya Hai ? Bihar Gk in hindi, Bihar Modern History Quiz Patana question answers in hindi pdf Sasaram questions in hindi, Know About Champaran Bihar Gk online test Bihar Gk notes in hindi quiz book Jharkhand