Ashoka's Kaushambi inscription is also known as —

The correct answer is Queen's Edict. The Queen's Edict on the Allahabad-Kosam pillar records donations attributed to Ashoka's queen Karuvaki. The same pillar complex also carries other edicts, so the location should not be confused with the separate Bhabru or Kalinga edicts. Similar-looking options often belong to a different edict, institution, dynasty, religious tradition, or chronological phase. Reading the wording closely is therefore essential, especially when the question uses expressions such as ‘according to the Arthashastra’, ‘major rock edict’, ‘traditionally associated’, or ‘first used widely’.