Which of the following rivers of Uttar Pradesh has been declared as 'Biological Disaster' due to Environmental Pollution?

Gomti River has become the most polluted river in Uttar Pradesh. Monitoring by the state authorities shows that the water if unfit for even bathing and this has been common knowledge since 2010. The extent of pollution is destroying the river's biodiversity. The Central Pollution Control Board (CPCB) has declared the Lucknow - Jaunpur stretch of the river among the most pollutriver stretches in the country.