Correct Option
Mahatma Gandhi undertook a fast unto death in 1932 primarily in protest against the Communal Award announced by British Prime Minister Ramsay MacDonald in August 1932.
The Communal Award proposed separate electorates for various groups, including the Depressed Classes (Scheduled Castes). Gandhi viewed this provision for separate electorates for the Depressed Classes as an attempt to politically segregate and permanently divide Hindu society. He commenced his fast on September 20, 1932, at Yerwada Jail, Pune, to oppose this aspect of the Award. This protest ultimately led to the Poona Pact on September 24, 1932, an agreement between Gandhi and Dr. B.R. Ambedkar, which replaced separate electorates for the Depressed Classes with reserved seats within the general electorate.
Incorrect Options
Option (A) is incorrect. While the Round Table Conferences failed to address Indian political aspirations adequately, Gandhi's fast unto death in 1932 was a direct response to the specific provisions of the Communal Award concerning separate electorates for the Depressed Classes, not a general protest against the conference outcomes.
Option (B) is incorrect. The immediate cause for Gandhi's fast was the Communal Award's impact on the Depressed Classes and the disagreement between Gandhi and Dr. B.R. Ambedkar on the mode of their representation. Differences between the Congress and the Muslim League were a broader political issue but not the direct trigger for this specific fast.
Option (D) is incorrect because option (C) accurately identifies the main reason for Mahatma Gandhi's fast unto death in 1932.