The verified response to “Ancient History question: Which one site marks the eastern limit of the Harappan Civilization?” is Alamgirpur, option D. The original question-specific evidence states: Alamgirpur in Uttar Pradesh marks the eastern limit of the Harappan Civilization. Alamgirpur is the correct answer to “Which one site marks the eastern limit 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 Balakot, Manda and Sutkagendor 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 Alamgirpur as the keyed response for this Ancient History question.