The correct answer is (a) Burzahom.
Burzahom is a Neolithic-Chalcolithic archaeological site located in the Srinagar district of Jammu and Kashmir, India. It is one of the earliest known settlements in the Kashmir Valley. The site has yielded evidence of pit dwellings, stone tools, and pottery. The pit dwellings were circular in shape and were made by digging into the ground. The walls of the dwellings were made of mud and the roofs were made of thatch. The stone tools found at the site include axes, adzes, and knives. The pottery found at the site is decorated with geometric designs.
The other options are incorrect because they are not Neolithic-Chalcolithic sites. Koldihwa is a Mesolithic site located in the Lalitpur district of Uttar Pradesh, India. Brahmagiri is a Chalcolithic site located in the Chitradurga district of Karnataka, India. Sangankallu is a Neolithic site located in the Raichur district of Karnataka, India.