बिहार के किस भाग में अपोढ़ मिट्टी की प्रधानता है ? - In which part of Bihar there is predominance of non-porous soil? - Bihar Ke Kis Bhag Me apodh Mitti Ki Paradhanta Hai ? Bihar Gk in hindi, Land and Soil Ganga Ka Dakshinni 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