Option b is the correct answer The river Sarswati is referred to as Matetama, Devitama and Naditama in Rigveda. It is identified with Ghaggar-Hakra channel in Haryana and Rajasthan. Important Tips Saraswati River: Saraswati River is a holy river first mentioned in the Rigveda. It is part of the Sapta Sindhu rivers mentioned in the Rig Veda. The other rivers are Sindhu (Indus), Sutudri (Satluj), Vitasta (Jhelum), Vipasa (Beas), Askini (Chenab) and Parushni (Ravi). The Rig Veda says the Saraswati flows between the Satluj in the west and the Yamuna in the east, and as flowing into the samudra.