The correct answer is (a) Chopani-Mando.
Chopani-Mando is an archaeological site located in the Belhar River valley in the Sonbhadra district of Uttar Pradesh, India. It is dated to the Mesolithic period, around 8,000 years ago. The site is significant for its evidence of early human habitation, including the remains of a hut, stone tools, and bone implements.
The bone implements found at Chopani-Mando are made from the bones of animals such as deer, cattle, and buffalo. They include a variety of tools, such as awls, needles, and scrapers. These tools were used for a variety of purposes, such as sewing, woodworking, and butchering.
The discovery of bone implements at Chopani-Mando provides evidence of the early use of tools by humans. It also suggests that these early humans were skilled hunters and gatherers.
The other options are incorrect because they are not Mesolithic sites. Kakoria is a Neolithic site, Mahadaha is a Chalcolithic site, and Sarai Nahar Rai is an Iron Age site.