Mahatma Gandhi undertook fast unto death in 1932, mainly because

1. Mahatma Gandhi undertook his famous fast unto death in Yerwada Jail, Poona, starting on September 20, 1932. 2. The immediate and main reason for this drastic step was the announcement of the Communal Award by the British Prime Minister, Ramsay Macdonald, in August 1932. 3. The Communal Award granted separate electorates not only to Muslims, Sikhs, Indian Christians, Anglo-Indians, and Europeans but also extended them to the Depressed Classes (Dalits). 4. Gandhi vehemently opposed the grant of separate electorates to the Depressed Classes, viewing it as a move that would permanently divide the Hindu society and hinder the fight against untouchability. 5. Therefore, his fast unto death was primarily aimed at protesting against this provision of the Communal Award and forcing its revision. 6. Option (A) is incorrect because while the failure of the Round Table Conference was part of the broader context, the specific trigger for the 1932 fast was the Communal Award. 7. Option (B) is incorrect as differences between the Congress and Muslim League were not the direct cause of this particular fast. 8. The fast eventually led to the signing of the Poona Pact between Gandhi and Dr. B. R. Ambedkar, which replaced separate electorates for the Depressed Classes with reserved seats within the general electorate.