Answer: Assam
Notes: Furnace and iron slag were recently found at Daojali Hading, showing early metallurgical practices during the Neolithic Age. Daojali Hading is a Neolithic site in Assam’s Dima Hasao district near the Brahmaputra valley. It gave India its first evidence of an Eastern Asiatic Neolithic complex, including double-shouldered celts and cord-marked pottery.
