Explanation – Excavations at Mayiladumparai, located in Krishnagiri district, have provided the earliest confirmed evidence of iron usage in India, dating back to 2172 BCE (approximately 4,200 years ago). Sivagalai has also shown potential evidence of iron use dating as early as 3345 BCE, but these findings are still under analysis and not yet universally accepted as definitive proof of large-scale iron usage.

Source: The Hindu