Option b is the correct answer The early occurrence of iron in India is reported from a number of sites in association with different chronological and cultural phases. The earliest evidence of the use of iron in India has been discovered from Atranjikhera in district Etah. Important Tips Mayiladumparai is the oldest Iron Age site. Mayiladumparai site is located in the Krishnagiri district of Tamil Nadu. It is habitation-cum-burial site. After excavations at the Mayiladumparai site, it is now confirmed that iron was used in Tamil Nadu state as early as 2172 BCE or 4,200 years ago.