Correct Option
The correct option is (a).
Explanation
The Peninsular Plateau of India is one of the oldest landmasses on Earth. While the main block covers central and southern India, geological movements have created detached extensions. The Meghalaya Plateau (also known as the Shillong Plateau) and the Karbi-Anglong Plateau in the northeast are geological extensions of the Peninsular Plateau, separated from the main block (specifically the Chotanagpur Plateau) by the Malda Fault (or Garo-Rajmahal Gap).
Statement-wise Analysis
- 1. Garo Hills: Correct. These hills form the western part of the Meghalaya Plateau. Being part of the Meghalaya Plateau, they are a geological extension of the Peninsular block.
- 2. Khasi Hills: Correct. Located in the central part of the Meghalaya Plateau, these are also part of the Peninsular extension.
- 3. Jaintia Hills: Correct. These hills form the eastern part of the Meghalaya Plateau and share the same geological origin as the Peninsular Plateau.
- 4. Shevroy Hills: Incorrect. The Shevroy (or Shevaroy) Hills are located in the Salem district of Tamil Nadu. They are part of the Eastern Ghats in the southern Peninsular block, not an extension located in the northeast.
Key Takeaway: The Meghalaya Plateau (Garo, Khasi, Jaintia) is geologically distinct from the Himalayas; it is an outlier of the Peninsular Plateau separated by the Malda Gap, whereas the Shevroy Hills are part of the Eastern Ghats in Southern India.