Who was the founder of Harijan Sevak Sangh founded in 1932?

Correct option is B

The correct answer is (b) Mahatma Gandhi.
 The founder of the Harijan Sevak Sangh, established in 1932, was Mahatma Gandhi.
 Its parent organization was the All India Anti Untouchability League founded by Mahatma Gandhi earlier on 30 September 1932.
 Later it was renamed as Harijan Sevak Sangh
 Mahatma Gandhi undertook a fast unto death in 1932 to protest against the separate electorate for Dalits proposed at the Round Table Conference in London.
 This fast led to the Poona Pact, an agreement with Dr. B.R. Ambedkar that resulted in reserved seats for Dalits within the general electorate.