कोसी नदी के सम्बन्ध में निम्नलिखित में से कौनसा कथन सत्य ? - Which of the following statements about the Kosi river is true? - Kosi Nadi Ke Sambandh Me NimnLikhit Me Se Kaunsa Kathan Satya ? Bihar Gk in hindi, Drainage System Kosi Nadi Apni Dhara Badalne Ke Liye KuKhyat Hai question answers in hindi pdf Yah Nadi Khagaria Ke Najdik Ganga Nadi Me Milti Hai questions in hindi, Know About Kosi Nadi Ko Nepal Me SaptKaushiki Ke Naam Se Jana Jata Hai Bihar Gk online test Bihar Gk notes in hindi quiz book Uparyukt Sabhi Kathan Satya Hain