Correct Option: A

The Junagadh rock inscription, found in Junagadh, was carved under the orders of King Rudradaman, who had obtained the title of Mahakshatrapa. He was the grandson of the famous Mahakshatrapa Chastana and was a Saka ruler from the Western Kshatrapa dynasty. The inscription is a chronicle about the rebuilding of a dam named Urjayat around the lake Sudarshana. The dam lay in the region of Saurashtra and the closest town appears to have been a place called Girinagar. It was fed by the rivers Suvarnasikata and Palasini, along with other smaller streams. The dam was originally built by Vaishya Pushyagupta who was the governor of the region under Chandragupta Maurya. Conduits from the dam were later built under orders of his grandson; Emperor Asoka.