Q. Which river is known as the "Sorrow of Bihar"?
Answer: Kosi
Notes: Kosi river is known as the "Sorrow of Bihar". The Kosi  is a trans-boundary river which flows through Tibet, Nepal and India. It drains the northern slopes of the Himalayas in Tibet and the southern slopes in Nepal. It is known as the  Sorrow of Bihar  as the annual floods affect about 21,000 km² (8,100 sq mi) of fertile agricultural lands thereby disturbing the rural economy. It has an average water flow (discharge) of 2,166 cubic metres per second (76,500 cu ft/s).

This question is part of Bihar General Studies MCQ Series Course on GKToday Android app.