Correct option is B
The Kosi River, often referred to as the "Sorrow of Bihar", is notorious for frequently changing its course. This river originates in the Himalayas in Nepal and flows into northern Bihar, India. Over the years, the river has caused severe flooding and destruction due to its unpredictable nature and tendency to shift course. These shifts occur because of heavy sediment deposition in its riverbed, which elevates the river, causing it to seek new paths. The changing course of the Kosi has displaced many communities and caused extensive damage to agriculture and infrastructure in the region.
