Q. The controversy over raising the dam height on the Narmada River involved which project?
Answer: Sardar Sarovar
Notes: The Sardar Sarovar Project on the Narmada River faced major controversy over increasing dam height due to displacement, rehabilitation, and environmental concerns. It is one of the largest dam projects in India with significant social and ecological impact. Other projects like Sanjay Sarovar, Indira Sagar, and Tawa Reservoir did not witness controversies of comparable scale.