• Chandraketugarh, located in the Ganges Delta, is actually consists of a cluster of villages in the 24 Parganas district of West Bengal, about 35 kilometres (22 mi) north-east of Kolkata. Hence row 1 is not correctly matched. • Inamgaon is a chalcolithic settlement located in the state of Maharashtra, India. Inamgaon is located in the Bhima river valley and was inhabited during the Chalcolithic period (c. 3300-1300 BCE). The settlement is believed to have been home to several thousand people. Hence row 2 is correctly matched. • Mangadu, in Kerala is a newly discovered prehistoric site where megaliths are found in large numbers. The date of the Mangadu megaliths is approximately from 1000 B.C. to 100 B.C. Hence row 3 is correctly matched. • Salihundam in Andhra Pradesh, India is known for its shrines dating back to the Buddhist era. The complex consists of monuments like mahastupas (large stupas), chaityas (prayer halls), viharas (monasteries), mandapas (pavilion halls), and votive stupas (smaller stupas). There is no rock-cut cave shrines here. Hence row 4 is not correctly matched. Hence option (b) is the correct answer.