Blind Dolphins are found in:

1. Ganges River
2. Nile River
3. Yangtze River
4. None

The South Asian river dolphin (Ganges River dolphin) is functionally blind, relying on echolocation. It inhabits the Ganges-Brahmaputra basins. The Yangtze River dolphin is likely extinct. Nile River lacks blind dolphin species, making the Ganges the correct answer. So, Blind Dolphins are found in River Ganges.