The verified response to “Ancient History question: Which one site marks the western boundary of the Harappan Civilization?” is Sutkagendor, option C. The original question-specific evidence states: Sutkagendor in Balochistan marked the western boundary. Sutkagendor is the correct answer to “Which one site marks the western boundary of the Harappan Civilization”. This evidence connects the required Ancient History fact with its archaeological, geographical, cultural or chronological setting. Harappan evidence must be interpreted from excavated settlements, artefacts, environmental data and comparisons among sites; a single object should not automatically support a wider claim than the evidence permits. The choices Alamgirpur, Manda and Daimabad do not satisfy the same combination of site, feature, river region, crop, craft, discovery, chronology or cultural association. A reliable check begins by identifying the question type: location, site feature, archaeological find, economic activity, urban planning, chronology or interpretation. Then compare the chosen answer with the relevant NCERT theme and reject options belonging to another site or category. Replaying that method confirms Sutkagendor as the keyed response for this Ancient History question.