Explanation:

2 and 3

• Chandraketugarh features many examples of terracotta art, displaying an unusual degree of precision and craftsmanship. These plaques are comparable to those found at other better-known sites such as Kaushambi and Ahichhatra.
• Inamgaon is a post-Harappan agrarian village and archaeological site located in Maharashtra, western India. Situated along the right bank of the Ghod River, it is considered to be the 'regional centre' of the Bhima Valley. Inamgaon is one of the most intensively and extensively excavated and well reconstructed Chalcolithic sites of the Deccan plateau.
• The megalithic monuments at Mangadu consisted of 28 hard compact and unhewn laterite blocks within an area of 5 cents of land. The stone blocks roughly form three circles of 3.5 metres, 4.15 metres and 5 metres in diameter respectively.
• The otherwise inconspicuous village of Salihundam, located on the banks of the Vamsadhara River, shot into fame when archaeological excavations here revealed an ancient Buddhist settlement. This site is now protected by the ASI, contains several votive stupas, a mahastupa, chaityas and viharas