(a) Gopal Baba Walangkar

(b) Jyotiba Phule

(c) Mohandas Karamchand Gandhi

(d) Bhimrao Ramji Ambedkar

Answer: a

Explanation:

Gopal Baba Walangkar

●        Gopal Krishna (alias Gopal Baba) was born at Ravdal (near Mahad, in the present Raigad district). 

●        He came under the dynamic influence of Jotiba Phooley.

●        Gopal Baba was a pioneer of the movement for the emancipation of the “Untouchables”, in the nineteenth century.

●        He founded the Anarya Dosh-Parihar Samaj in 1886; and in 1888, he published his monthly Vital-Vidhvansak (Destroyer of Brahmanical or Ceremonical Pollution) which was the first-ever journal of the “Untouchables”.

●        Subsequently, in 1889, he published his book entitled Vital Vidvansan (Annihilation of Ceremonical Pollution)

Hence, option a is correct.

Read: Previous Year UPSC History Questions (PYQs) With Explanation 2020