The correct answer is C. Sardar Sarovar project.
Medha Patkar is an Indian social activist who has been involved in a number of movements against large dams, including the Sardar Sarovar project. The Sardar Sarovar project is a hydroelectric dam on the Narmada River in Gujarat, India. The project has been controversial since its inception, with critics arguing that it will displace thousands of people and damage the environment. Patkar has been a leading voice in the opposition to the project, and she has been arrested and jailed on several occasions for her activism.
The Tehri project is a hydroelectric dam on the Tehri River in Uttarakhand, India. The project has also been controversial, with critics arguing that it will displace thousands of people and damage the environment. Patkar has been involved in the opposition to the project, but she has not been as closely associated with it as she has with the Sardar Sarovar project.
The Enron project was a natural gas power plant project in Dabhol, India. The project was controversial, with critics arguing that it was a bad deal for India and that it would damage the environment. Patkar was involved in the opposition to the project, but she was not as closely associated with it as she has been with the Sardar Sarovar and Tehri projects.