The correct option is D Limestone
Hunsgi is a town in the Shorapur taluk of Yadgir district in Karnataka. A number of early Palaeolithic sites were found here. At some sites, a large number of tools, used for all sorts of activities, were found. These were probably habitation-cum factory sites. In some of the other, smaller sites, there is evidence to suggest that tools were made. Some of the sites were close to springs. Most tools were made from limestone, which was locally available.