Description : The 'sorrow of Bihar' is – (1) Damodar (2) Kosi (3) Son (4) Gandak
Last Answer : (2) Kosi Explanation: Kosi is known as the "sorrow of Bihar", as it has caused widespread human suffering in the past due to flooding and very frequent changes in course, when it flows ... attributed to the heavy silt it carries during the monsoon season and flooding in India has extreme effects.