Geography · Physiography of Rajasthan

Consider the following statements regarding the physiographic characteristics of Rajasthan: 1. In the Dune-Free Tract of the Western Sandy Plains, dry riverbeds and banks are recognized as potential sources of groundwater. 2. The Shekhawati Region is characterized by a sandy terrain where the sand dunes are primarily of the transverse type. 3. The Deccan Highlands of the Hadoti Plateau feature three concentric escarpments composed of sandstone layers interspersed with slate-stones. 4. The Banas Basin is described as an elevated peneplain where the primary river originates from the Khamnor Hills of the Aravalli Range. Which of the statements given above are correct?