The correct answer is (d).
Evidence of Paleolithic settlements in Assam has been discovered primarily in the districts of Kamrup and Nagaon. The most significant discovery was made at the site of Daojali Hading, which is located in the Nagaon district. Daojali Hading is a prehistoric rock shelter that contains a large number of stone tools and other artifacts. The tools are made from a variety of materials, including chert, quartz, and sandstone. They date back to the Lower Paleolithic period, which is between 2.5 million and 100,000 years ago.
Other important Paleolithic sites in Assam include the following:
- The site of Langting, which is located in the Kamrup district, contains a number of stone tools that date back to the Middle Paleolithic period.
- The site of Lakhipur, which is located in the Cachar district, contains a number of stone tools that date back to the Upper Paleolithic period.
- The site of Sonapur, which is located in the Kamrup district, contains a number of stone tools that date back to the Mesolithic period.
The discovery of Paleolithic settlements in Assam provides evidence that the region was inhabited by humans for a long period of time. The tools and artifacts found at these sites provide insights into the lives of the early inhabitants of Assam.
The other options are incorrect because they do not contain any Paleolithic sites.