Q. Which iron activity was found at Maharashtra's Hirapur dolmens site?
Answer: Iron smelting
Notes: The Hirapur dolmens site in Chandrapur, Maharashtra, dating to 2nd–3rd century BCE, shows clear evidence of ancient iron smelting activities. It is among the largest megalithic sites in India and offers rare documentation of iron technology during the Satavahana period in the Vidarbha region.