उत्तर बिहार की उस नदी का नाम बताएं, जो बिहार में सबसे पश्चिम में गंगा में मिलती है ? - Name the river of North Bihar, which joins the Ganges in the west of Bihar. - Uttar Bihar Ki Us Nadi Ka Naam Batayein , Jo Bihar Me Sabse Pashchim Me Ganga Me Milti Hai ? Bihar Gk in hindi, Drainage System Ghaghra question answers in hindi pdf Punpun questions in hindi, Know About Gandak Bihar Gk online test Bihar Gk notes in hindi quiz book Son