Correct Answer:
D. Larkana
Mohenjo-daro, one of the largest and most important settlements of the ancient Indus Valley Civilization, is historically and geographically located in the Larkana District of Sindh, Pakistan. This site is crucial for understanding the urban planning and culture of the Bronze Age. Options like Khairpur, Sukkur, and Dadu are districts within Sindh but do not host the Mohenjo-daro archaeological site. The correct identification of its location is fundamental to the study of ancient South Asian geography and history.