The correct answer is: B. Kosi
The Indrapuri Barrage is a barrage on the Kosi River in Bihar, India. It was constructed in 1963 to control floods and provide irrigation water for the surrounding area. The barrage is 1,200 meters long and 10 meters high. It has 36 gates, each of which is 15 meters wide. The barrage has been effective in controlling floods, but it has also had some negative environmental impacts. For example, it has blocked the migration of fish and has caused the siltation of the riverbed.
The other options are incorrect because: