The verified response to “Ancient History question: Which river or river-region is associated with Kalibangan?” is Ghaggar, option D. The original question-specific evidence states: Kalibangan is associated with the Ghaggar region. Ghaggar is the correct answer to “Which river or river-region is associated with Kalibangan”. This evidence connects the required Ancient History fact with its archaeological, geographical, cultural or chronological setting. The choices Indus, Saurashtra coastal region and Ravi do not satisfy the same combination of site, feature, river region, crop, craft, discovery, chronology or cultural association. Replaying that method confirms Ghaggar as the keyed response for this Ancient History question.