गण्डक जो उत्तर पश्चिम बिहार की एक प्रमुख नदी है बिहार की सीमा में किस जगह प्रवेश करती है ? - Gandak, which is a major river of North West Bihar, enters the border of Bihar at which place? - Gandak Jo Uttar Pashchim Bihar Ki Ek Pramukh Nadi Hai Bihar Ki Seema Me Kis Jagah Pravesh Karti Hai ? Bihar Gk in hindi, Drainage System Chhapra question answers in hindi pdf Siwan questions in hindi, Know About Valmiki Nagar Bihar Gk online test Bihar Gk notes in hindi quiz book GopalGanj