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

The Peninsular Block of India is one of the oldest landmasses, characterized by stable tectonic features but with some submergence along the western coast (linked to faulting/tectonic activity that created the western coastal plains and Arabian Sea formation) — Statement 1 is correct. Residual hills like the Veliconda hills and Mahendragiri hills in the Eastern Ghats are indeed part of the peninsular block — Statement 2 is correct. Statement 3 is incorrect: peninsular rivers (Godavari, Krishna, Cauvery) are generally mature, slow-flowing rivers with broad shallow valleys, not deep V-shaped valleys. Deep V-shaped valleys are characteristic of young Himalayan rivers, not peninsular rivers.