The correct answer is B. Kosi.
The Kosi River is a river in northern India and eastern Nepal. It is the largest tributary of the Ganges River. The Kosi River is known as the “Sorrow of Bihar” because it is prone to flooding, which has caused widespread damage and loss of life.
The Kosi River originates in the Himalayas in Nepal. It flows eastward through Nepal and then turns south into India. The river enters Bihar state in India and then flows eastward again. The Kosi River finally joins the Ganges River in the state of West Bengal.
The Kosi River is a major source of irrigation for the region. However, the river is also prone to flooding. The Kosi River has changed course many times over the centuries. The river has also caused widespread damage and loss of life due to flooding.
In 1954, the Kosi Barrage was built on the Kosi River in an attempt to control flooding. However, the barrage has not been able to prevent all flooding. In 2008, the Kosi River flooded again, causing widespread damage and loss of life.
The Kosi River is a major river in northern India and eastern Nepal. The river is known as the “Sorrow of Bihar” because it is prone to flooding. The Kosi River has changed course many times over the centuries and has caused widespread damage and loss of life due to flooding.