Which of the following statements in respect to the Indian Peninsular Plateau are correct? 1. The Deccan Plateau gradually rises from North to South. 2. The Malwa Plateau dominates the Vindhyan scarps, forming the Eastern flank of the plateau. 3. The Western Satpuras separate the Narmada and Tapi rivers. 4. The Chota Nagpur Plateau is composed of Archaean granite and gneiss rocks. Select the correct answer using the code given below.