The correct answer is (c). The Main Central Thrust (MCT) is a major geological fault that separates the Greater Himalaya from the Lesser Himalaya. The MCT is a thrust fault, which means that the Lesser Himalaya has been thrust over the Greater Himalaya. The MCT is a major tectonic boundary, and it has played a significant role in the evolution of the Himalayas.
The Gangetic Plain is a vast alluvial plain that lies to the south of the Himalayas. The Gangetic Plain is formed by the deposition of sediments from the Ganges River. The Siwalik Hills are a range of foothills that lie to the south of the Lesser Himalaya. The Siwalik Hills are formed by the deposition of sediments from the Himalayan rivers. The Tibetan Plateau is a high-altitude plateau that lies to the north of the Himalayas. The Tibetan Plateau is formed by the collision of the Indian and Eurasian plates.
The Main Central Thrust is a major geological fault that separates the Greater Himalaya from the Lesser Himalaya. The MCT is a thrust fault, which means that the Lesser Himalaya has been thrust over the Greater Himalaya. The MCT is a major tectonic boundary, and it has played a significant role in the evolution of the Himalayas.