The correct answer is option 3: "48 hours before the hour of commencement of polling." Electioneering refers to any activities done by candidates or political parties to campaign and persuade voters to vote for them. This includes rallies, speeches, advertisements, and other promotional activities. In order to ensure a fair and unbiased election process, electioneering needs to be stopped before the polling begins. Option 1, "24 hours before the poll commences," is incorrect because it gives candidates and parties a shorter time frame to campaign. Option 2, "24 hours before the closing hour of polling," is also incorrect because it allows campaigning until the polls are closed, which can influence last-minute voters. Option 4, "48 hours before the closing hour of polling," is incorrect because it suggests that electioneering can continue until the end of the voting period.