Pair 1 is correct: Pandharpur is a well-known pilgrimage town on the banks of Chandrabhaga River in Solapur district, Maharashtra, India. Pair 2 is correct: Tiruchirapalli is located along the Kaveri River in Tamil Nadu, India. Pair 3 is incorrect: Hampi, also referred to as the Group of Monuments at Hampi, is a UNESCO World Heritage Site located in east-central Karnataka, India. It is located near the Tungabhadra River. Thus, only 1 and 2 are correct.