Correct Option: D

Sunderlal Bahuguna: noted Garhwali environmentalist and Chipko movement leader; Medha Patkar: known for her role in Narmada Bachao Andolan; Panduranga Hegde: known as the person who started Appiko movement to protect trees in Western Ghats; and Baba Amte: social worker and social activist known particularly for his work for the rehabilitation and empowerment of poor people suffering from leprosy.