The correct option is B Dr B.R. Ambedkar
Annihilation of Caste was a speech prepared by Dr. B.R. Ambedkar written in 1936. It remained undelivered and was later published by him. Dr. B.R. Ambedkar who is known as the father of the Constitution wad against the discriminatory practices like untouchability and caste differences. He explained the methods to root out penetrative caste system prevailing in society.