बिहार के किस भाग में जलोढ़ मिट्टी की प्रधानता है ? - In which part of Bihar is the alluvial soil predominant? - Bihar Ke Kis Bhag Me Jalodh Mitti Ki Paradhanta Hai ? Bihar Gk in hindi, Land and Soil Ganga Ka Dakshinn Maidan question answers in hindi pdf Chhota Nagpur Ka Pathar questions in hindi, Know About Ganga Ka Uttari Maidan Bihar Gk online test Bihar Gk notes in hindi quiz book Inme Se Koi Nahi