Correct Answer: (b) M.K. Gandhi
Solution:Mahatma Gandhi called untouchables Harijans (''Children of the God Hari Vishnu) and long worked for their emancipation. Untouchable, also called Dalit, officially scheduled caste, formerly Harijan, in traditional Indian society. Harijan, originally written in Odia by Gopinath Mahanty is considered to be one of his finest works pubilshed in 1949 was translated into Engilsh by Bikram Das.