बिहार में कहाँ विक्रमशिला गंगा डाल्फिन अभयारण्य स्थित है ? - Where is Vikramshila Ganga Dolphin Sanctuary located in Bihar? - Bihar Me Kahan Vikramashila Ganga Dolphin Abhyaranya Sthit Hai ? Bihar Gk in hindi, Forest and Wild Life Bhagalpur question answers in hindi pdf RajGeer questions in hindi, Know About Banka Bihar Gk online test Bihar Gk notes in hindi quiz book Katihar