. The longest dam in India is
- In Orissa, the Hirakud dam is being erected across the Mahanadi River.
- Hirakud Dam is one of the world's longest dams, measuring around 26 kilometers in length.
- The Hirakud Reservoir is a 55-kilometer-long multifunctional plan for flood control, irrigation, and power generation.
Hence, Option (B) is correct i.e. Hirakud