Concept:Separate electorates were demanded by some depressed class leaders for political representation.Explanation:Statement 1 is incorrect. M.C. Rajah's All India Depressed Classes Association actually supported a separate electorate, not a joint one.Statement 2 is correct. The All India Depressed Classes Leaders' Conference demanded a separate electorate.Statement 3 is correct. The Communal Award (September 1932) provided separate electorates for 'untouchables' (now Scheduled Castes).Therefore, only statements 2 and 3 are correct.Answer:2 and 3 only (Option B).