Correct Answer: 3. Adichanallur
Solution:Adichanallur, in Tamil Nadu, is a significant Iron Age site where archaeologists discovered urn burials, iron bar bits, and gold diadems. The site is dated to around 1000-600 ВСЕ, indicating an advanced, stratified society. Findings include bronze items, weapons, and skeletal remains, revealing early burial rituals and metallurgy. It is considered one of the earliest examples of protohistoric culture in South India.