Which of the following geographical features or phenomena is/are associated with the Peninsular Block of India ?<br/><br/>1. Submergence of parts of the western coast due to tectonic activity<br/>2. Presence of residual mountain ranges such as the Veliconda hills and Mahendragiri hills<br/>3. Deep, V-shaped river valleys formed by fast-flowing rivers<br/><br/>Select the answer using the code given below :<br/>

1 is correct: NCERT-derived physiography text describes the Peninsular block as a rigid block, with parts of the western coast submerged and some parts changed due to tectonic activity. 2 is correct: the same standard text lists Veliconda hills and Mahendragiri hills among the Peninsula’s relict/residual mountains. 3 is incorrect: NCERT describes the Peninsular plateau as having wide/broad and shallow valleys, whereas deep V-shaped valleys are associated with youthful relief such as the Himalaya. Hence, 1 and 2 only.