Correct Option
The correct option is 1, 2, 3 and 4
Explanation
The Peninsular Plateau is a tableland composed of old crystalline, igneous, and metamorphic rocks. It is considered one of the oldest and most stable landmasses in India. Its geographical extent is defined by specific hill ranges and geological extensions that mark its outer boundaries.
Statement-wise Analysis
- Statement 1 is Correct: The Delhi Ridge acts as the northwest extension of the Aravalli Range. It is geologically regarded as the northwestern boundary of the Peninsular Plateau.
- Statement 2 is Correct: The Rajmahal Hills in the east represent the eastern edge of the main Peninsular block, beyond which lies the Malda Fault separating it from the Meghalaya Plateau.
- Statement 3 is Correct: The Gir Range located in the Kathiawar peninsula of Gujarat is geologically an extension of the Peninsular block. It constitutes the western outer extent of the plateau.
- Statement 4 is Correct: The Cardamom Hills are located in the southernmost part of the Western Ghats. They mark the southern limit of the Peninsular Plateau.
Key Takeaway
According to standard physical geography definitions, the outer extent of the Peninsular Plateau is marked by the Delhi Ridge (Northwest), Rajmahal Hills (East), Gir Range (West), and Cardamom Hills (South).