Correct Answer: (d) Rishi Gautama Rahugana
Note: It is believed that Saraswati was the scene of the activities of the famous Vedic Tribes - The Bharatas, the Purus, and the Kurus. The Shatapatha Brahmana narrates the story of King Videgha Madhava (a king of Videha) accompanied by his priest Rishi Gautama Rahugana, carrying the sacred fire to east preserving thereby the tradition that the Kosalas and the Videhas received from their culture.